Universal Unit Conversion Tool

Convert between hundreds of measurement units with precision - Based on ISA Standards

Length Conversion

Value

From Unit Millimetre (mm) Centimetre (cm) Metre (m) Kilometre (km) Inch (in) Foot (ft) Yard (yd) Mile (mi)

To Unit Metre (m) Millimetre (mm) Centimetre (cm) Kilometre (km) Inch (in) Foot (ft) Yard (yd) Mile (mi)

Result:

0.00

Enter a value and select units to convert

Mass Conversion

Value

From Unit Milligram (mg) Gram (g) Kilogram (kg) Metric Tonne (t) Ounce (oz) Pound (lb) Stone (st) Short Ton

To Unit Kilogram (kg) Milligram (mg) Gram (g) Metric Tonne (t) Ounce (oz) Pound (lb) Stone (st) Short Ton

Result:

0.00

Enter a value and select units to convert

Volume Conversion

Value

From Unit Millilitre (mL) Centilitre (cL) Decilitre (dL) Litre (L) Cubic Metre (m³) Teaspoon (tsp) Tablespoon (tbsp) Fluid Ounce (fl oz) Cup Pint (pt) Quart (qt) Gallon (gal)

To Unit Litre (L) Millilitre (mL) Centilitre (cL) Decilitre (dL) Cubic Metre (m³) Teaspoon (tsp) Tablespoon (tbsp) Fluid Ounce (fl oz) Cup Pint (pt) Quart (qt) Gallon (gal)

Result:

0.00

Enter a value and select units to convert

Temperature Conversion

Value

From Unit Celsius (°C) Fahrenheit (°F) Kelvin (K)

To Unit Fahrenheit (°F) Celsius (°C) Kelvin (K)

Result:

0.00

Enter a value and select units to convert

Time Conversion

Value

From Unit Second (s) Minute (min) Hour (hr) Day Week Month (30 days) Year (365 days) Decade Century

To Unit Minute (min) Second (s) Hour (hr) Day Week Month (30 days) Year (365 days) Decade Century

Result:

0.00

Enter a value and select units to convert

Time Conversion Reference

Common Time Conversions

• 1 minute = 60 seconds
• 1 hour = 60 minutes = 3,600 seconds
• 1 day = 24 hours = 1,440 minutes = 86,400 seconds
• 1 week = 7 days = 168 hours
• 1 month (average) = 30.44 days
• 1 year = 365 days (366 in leap years)
• 1 decade = 10 years
• 1 century = 100 years
• 1 millennium = 1,000 years

Energy Conversion

Value

From Unit Joule (J) Kilojoule (kJ) Calorie (cal) Kilocalorie (kcal) Watt-hour (Wh) Kilowatt-hour (kWh) Electronvolt (eV) British Thermal Unit (BTU) Foot-pound (ft·lb)

To Unit Joule (J) Kilojoule (kJ) Calorie (cal) Kilocalorie (kcal) Watt-hour (Wh) Kilowatt-hour (kWh) Electronvolt (eV) British Thermal Unit (BTU) Foot-pound (ft·lb)

Result:

0.00

Enter a value and select units to convert

Energy Conversion Reference

Common Energy Conversions

• 1 joule (J) = 1 watt-second
• 1 kilojoule (kJ) = 1,000 joules
• 1 calorie (cal) = 4.184 joules
• 1 kilocalorie (kcal) = 1,000 calories = 4,184 joules
• 1 watt-hour (Wh) = 3,600 joules
• 1 kilowatt-hour (kWh) = 3,600,000 joules
• 1 electronvolt (eV) = 1.602 × 10^-19 joules
• 1 BTU = 1,055 joules
• 1 foot-pound (ft·lb) = 1.356 joules

Area Conversion

Value

From Unit Square Millimetre (mm²) Square Centimetre (cm²) Square Metre (m²) Hectare (ha) Square Kilometre (km²) Square Inch (in²) Square Foot (ft²) Square Yard (yd²) Acre Square Mile (mi²)

To Unit Square Metre (m²) Square Millimetre (mm²) Square Centimetre (cm²) Hectare (ha) Square Kilometre (km²) Square Inch (in²) Square Foot (ft²) Square Yard (yd²) Acre Square Mile (mi²)

Result:

0.00

Enter a value and select units to convert

Area Conversion Reference

Common Area Conversions

• 1 square metre (m²) = 10,000 square centimetres
• 1 hectare (ha) = 10,000 square metres
• 1 square kilometre (km²) = 1,000,000 square metres
• 1 square inch (in²) = 6.4516 square centimetres
• 1 square foot (ft²) = 144 square inches
• 1 square yard (yd²) = 9 square feet
• 1 acre = 43,560 square feet
• 1 square mile (mi²) = 640 acres

Power Conversion

Value

From Unit Watt (W) Kilowatt (kW) Megawatt (MW) Gigawatt (GW) Horsepower (hp) Metric Horsepower (PS) BTU per hour Foot-pound per second

To Unit Watt (W) Kilowatt (kW) Megawatt (MW) Gigawatt (GW) Horsepower (hp) Metric Horsepower (PS) BTU per hour Foot-pound per second

Result:

0.00

Enter a value and select units to convert

Power Conversion Reference

Common Power Conversions

• 1 watt (W) = 1 joule per second
• 1 kilowatt (kW) = 1,000 watts
• 1 megawatt (MW) = 1,000,000 watts
• 1 gigawatt (GW) = 1,000,000,000 watts
• 1 horsepower (hp) = 745.7 watts
• 1 metric horsepower (PS) = 735.5 watts
• 1 BTU per hour = 0.293 watts
• 1 foot-pound per second = 1.356 watts

Force Conversion

Value

From Unit Newton (N) Kilonewton (kN) Dyne (dyn) Pound-force (lbf) Kilogram-force (kgf) Ounce-force (ozf)

To Unit Newton (N) Kilonewton (kN) Dyne (dyn) Pound-force (lbf) Kilogram-force (kgf) Ounce-force (ozf)

Result:

0.00

Enter a value and select units to convert

Force Conversion Reference

Common Force Conversions

• 1 newton (N) = 1 kg·m/s²
• 1 kilonewton (kN) = 1,000 newtons
• 1 dyne (dyn) = 10^-5 newtons
• 1 pound-force (lbf) = 4.448 newtons
• 1 kilogram-force (kgf) = 9.807 newtons
• 1 ounce-force (ozf) = 0.278 newtons

Density Conversion

Value

From Unit Kilogram per cubic metre (kg/m³) Gram per cubic centimetre (g/cm³) Gram per millilitre (g/mL) Pound per cubic foot (lb/ft³) Pound per cubic inch (lb/in³) Ounce per cubic inch (oz/in³)

To Unit Kilogram per cubic metre (kg/m³) Gram per cubic centimetre (g/cm³) Gram per millilitre (g/mL) Pound per cubic foot (lb/ft³) Pound per cubic inch (lb/in³) Ounce per cubic inch (oz/in³)

Result:

0.00

Enter a value and select units to convert

Density Conversion Reference

Common Density Conversions

• 1 kg/m³ = 0.001 g/cm³
• 1 g/cm³ = 1,000 kg/m³
• 1 g/mL = 1 g/cm³
• 1 lb/ft³ = 16.018 kg/m³
• 1 lb/in³ = 27,680 kg/m³
• 1 oz/in³ = 1,730 kg/m³

Viscosity Conversion

Value

From Unit Pascal-second (Pa·s) Centipoise (cP) Poise (P) Pound-second per square foot Square metre per second (m²/s) Centistokes (cSt) Stokes (St)

To Unit Pascal-second (Pa·s) Centipoise (cP) Poise (P) Pound-second per square foot Square metre per second (m²/s) Centistokes (cSt) Stokes (St)

Result:

0.00

Enter a value and select units to convert

Viscosity Conversion Reference

Common Viscosity Conversions

• 1 pascal-second (Pa·s) = 1,000 centipoise
• 1 centipoise (cP) = 0.001 Pa·s
• 1 poise (P) = 100 centipoise
• 1 pound-second per square foot = 47.88 Pa·s
• 1 square metre per second (m²/s) = 10,000 stokes
• 1 centistoke (cSt) = 0.000001 m²/s
• 1 stoke (St) = 0.0001 m²/s

Currency Conversion

Value

From Currency US Dollar (USD) Euro (EUR) British Pound (GBP) Japanese Yen (JPY) Canadian Dollar (CAD) Australian Dollar (AUD) Swiss Franc (CHF) Chinese Yuan (CNY) Indian Rupee (INR) Brazilian Real (BRL) Mexican Peso (MXN) Russian Ruble (RUB)

To Currency Euro (EUR) US Dollar (USD) British Pound (GBP) Japanese Yen (JPY) Canadian Dollar (CAD) Australian Dollar (AUD) Swiss Franc (CHF) Chinese Yuan (CNY) Indian Rupee (INR) Brazilian Real (BRL) Mexican Peso (MXN) Russian Ruble (RUB)

Result:

0.00

Enter a value and select currencies to convert

Currency Conversion Note

Important Information

Currency exchange rates change constantly. The conversion rates used in this tool are approximate and for demonstration purposes only. For accurate, up-to-date exchange rates, please refer to financial websites or your bank.

This tool uses fixed exchange rates based on approximate values and does not reflect real-time market conditions.

Astronomical Distance Conversion

Value

From Unit Kilometre (km) Astronomical Unit (AU) Light Year (ly) Parsec (pc) Light Second Light Minute Light Hour

To Unit Astronomical Unit (AU) Kilometre (km) Light Year (ly) Parsec (pc) Light Second Light Minute Light Hour

Result:

0.00

Enter a value and select units to convert

Astronomical Distance Reference

Common Astronomical Conversions

• 1 Astronomical Unit (AU) = 149,597,870.7 kilometres
• 1 Light Year (ly) = 63,241.1 AU = 9.461 × 10¹² kilometres
• 1 Parsec (pc) = 3.26156 light years = 206,265 AU
• 1 Light Second = 299,792 kilometres
• 1 Light Minute = 17,987,500 kilometres
• 1 Light Hour = 1,079,250,000 kilometres

The Metric System - King Hector Mnemonic

Kilo

King

Kilometre

Kilogram

Kilolitre

Hecto

Hector

Hectometre

Hectogram

Hectolitre

Deka

Declares

Dekametre

Dekagram

Dekalitre

(Unit)

Unite

Metre

Gram

Litre

Deci

Decide

Decimetre

Decigram

Decilitre

Centi

Chocolate

Centimetre

Centigram

Centilitre

Milli

Milk

Millimetre

Milligram

Millilitre

How to Use the Mnemonic

Remember the phrase: "King Hector Declares Unite Decide Chocolate Milk"

This helps remember the metric prefixes in order from largest to smallest:

Kilo (1000), Hecto (100), Deka (10), Unit (1), Deci (0.1), Centi (0.01), Milli (0.001)

Metric Conversion Chart

Length	Mass	Volume
1 km = 10 hm	1 kg = 10 hg	1 kL = 10 hL
1 hm = 10 dam	1 hg = 10 dag	1 hL = 10 daL
1 dam = 10 m	1 dag = 10 g	1 daL = 10 L
1 m = 10 dm	1 g = 10 dg	1 L = 10 dL
1 dm = 10 cm	1 dg = 10 cg	1 dL = 10 cL
1 cm = 10 mm	1 cg = 10 mg	1 cL = 10 mL

Length (Reverse)	Mass (Reverse)	Volume (Reverse)
1 mm = 1/10 cm	1 mg = 1/10 cg	1 mL = 1/10 cL
1 cm = 1/10 dm	1 cg = 1/10 dg	1 cL = 1/10 dL
1 dm = 1/10 m	1 dg = 1/10 g	1 dL = 1/10 L
1 m = 1/10 dam	1 g = 1/10 dag	1 L = 1/10 daL
1 dam = 1/10 hm	1 dag = 1/10 hg	1 daL = 1/10 hL
1 hm = 1/10 km	1 hg = 1/10 kg	1 hL = 1/10 kL

SI Unit Prefixes

Prefix	Symbol	Multiplying Factor	Numerical
exa	E	1018	1,000,000,000,000,000,000
peta	P	1015	1,000,000,000,000,000
tera	T	1012	1,000,000,000,000
giga	G	109	1,000,000,000
mega	M	106	1,000,000
kilo	k	103	1,000
hecto	h	102	100
deca	da	101	10
(unit)	-	100	1
deci	d	10-1	0.1
centi	c	10-2	0.01
milli	m	10-3	0.001
micro	μ	10-6	0.000001
nano	n	10-9	0.000000001
pico	p	10-12	0.000000000001
femto	f	10-15	0.000000000000001
atto	a	10-18	0.000000000000000001

Universal Unit Conversion Tool © 2023 | Based on ISA Conversion Tables | All conversions are approximate

Divisibility Rule Checker ONLINE TOOL ANY DIGIT

Divisibility Rule Checker

Check if a number is divisible by another number using divisibility rules

Enter a number:

Check divisibility by:

Divisibility by 7 Tips

• Double and Subtract Method: Double the last digit and subtract it from the rest of the number. If the result is divisible by 7, then the original number is too.
• Example: For 343 → 34 - (2×3) = 34 - 6 = 28, which is divisible by 7.
• Block Method: Group digits in blocks of 3 from right to left, then alternately add and subtract these blocks. If the result is divisible by 7, so is the original number.

Divisibility by 8 Tips

• Last Three Digits: A number is divisible by 8 if its last three digits form a number divisible by 8.
• Example: 12,416 is divisible by 8 because 416 ÷ 8 = 52.
• Even Hundreds: If the hundreds digit is even, check if the last two digits are divisible by 8. If the hundreds digit is odd, check if the last two digits + 4 are divisible by 8.

Divisibility Rules

Divisible by 2

The last digit is even (0, 2, 4, 6, or 8).

Example: 128 is divisible by 2 because it ends with 8.

Divisible by 3

The sum of all digits is divisible by 3.

Example: 381 (3+8+1=12) is divisible by 3.

Divisible by 4

The last two digits form a number divisible by 4.

Example: 7,316 is divisible by 4 because 16 is divisible by 4.

Divisible by 5

The last digit is 0 or 5.

Example: 295 is divisible by 5 because it ends with 5.

Divisible by 6

The number is divisible by both 2 and 3.

Example: 114 is even and 1+1+4=6 is divisible by 3.

Divisible by 7

Double the last digit and subtract it from the rest of the number. Repeat if needed.

Example: 343 → 34 - (2×3) = 28, which is divisible by 7.

Divisible by 8

The last three digits form a number divisible by 8.

Example: 12,416 is divisible by 8 because 416 ÷ 8 = 52.

Divisible by 9

The sum of all digits is divisible by 9.

Example: 2,187 (2+1+8+7=18) is divisible by 9.

Divisible by 10

The last digit is 0.

Example: 9,370 is divisible by 10 because it ends with 0.

Divisible by 11

The alternating sum of digits is divisible by 11.

Example: 1,364 → (1-3+6-4)=0, which is divisible by 11.

Divisibility Rule Checker | No Prime/Composite Identification

EQUIVALENT FRACTIONS PRACTICE QUIZ

Complete the Equivalent Fractions

Question 1/15

Fill in the missing numbers to make the fractions equivalent:

Score: 0/15

The Power of Puzzles: Why Thinking Differently Matters

 

The Power of Puzzles: Why Thinking Differently Matters 

By Chithra Dhananjayan, Mathematics Department

Have you ever tried solving a tricky puzzle and felt that “aha!” moment when the answer finally clicked? That’s the magic of puzzles — they make our minds sharper and teach us to think in new ways.

When I was younger, I thought mathematics was all about numbers and formulas. But once I started solving puzzles, I realized that maths is not just about getting answers — it’s about thinking differently. Every puzzle hides a pattern, a clue, or a smart shortcut that challenges our brain to see things from another angle.

Puzzles make us patient thinkers. Sometimes, we fail again and again before finding the right path. But that’s what learning is all about — exploring, experimenting, and not giving up. When we try to solve Sudoku, riddles, or logic grids, our brain practices creativity, reasoning, and problem-solving — all at once! 

In fact, puzzles are like mental gyms. Just like exercise strengthens our body, solving puzzles strengthens our brain. They also make maths fun and exciting. When we approach problems with curiosity instead of fear, we discover that even the hardest questions can be solved with the right mindset.

So the next time you face a challenging problem, treat it like a puzzle. Don’t rush for the answer — enjoy the journey of thinking, guessing, and discovering. Because in mathematics, and in life too, the real power lies not just in knowing the answer, but in thinking differently to find it.

As a Mathematics teacher, I’ve always believed that true learning begins when students start thinking differently. One of the most effective ways I’ve seen this happen in the classroom is through puzzles.

Mathematical puzzles do more than test a student’s knowledge — they awaken curiosity. When students engage with a riddle or a logic puzzle, their minds start searching for patterns, connections, and hidden clues. In that process, they begin to understand that mathematics is not confined to formulas and numbers; it’s a way of thinking, exploring, and reasoning.

I’ve noticed that even the quietest learners come alive when a puzzle is presented. There’s excitement in the air — eyes light up, ideas are exchanged, and every student becomes a problem-solver. What I love most is that puzzles encourage multiple ways of thinking. There isn’t just one “right” path; there are many creative routes to reach a solution.

Puzzles teach patience, perseverance, and logical reasoning — skills that go far beyond the classroom. They help students realise that making mistakes is part of discovery, and that success often comes to those who dare to look at problems from a new angle.

In a world that constantly changes, the ability to think differently is one of the greatest strengths we can give our learners. And through puzzles, mathematics becomes not just a subject to study — but a joyful journey of imagination, challenge, and discovery.

❤️ How I Fell in Love with Mathematics

By Chithra Dhananjayan, Mathematics Department

My journey with mathematics began not in a classroom, but in the small everyday wonders around me. As a child, I was fascinated by patterns — the petals of a flower, the rhythm of a song, or the shapes of tiles on the floor. I didn’t realise it then, but I was already discovering the beauty of mathematics hidden in daily life.

When I started learning mathematics at school, I was amazed by how a few simple symbols and numbers could explain so much about our world. Each problem felt like a mystery waiting to be solved, and every formula seemed like a secret key that unlocked new understanding. But what truly made me fall in love with maths was the sense of logic and creativity it offered — it taught me that there can be many ways to reach one answer.

As I became a teacher, my love for mathematics deepened. I found joy in helping students overcome their fear of numbers and see maths as a friend, not a foe. Watching a student’s face light up when they finally “get it” — that’s the most rewarding moment for any teacher.

To me, mathematics is not just a subject; it’s a way of thinking. It teaches us patience, clarity, and confidence. Every equation tells a story of balance, and every problem teaches perseverance.

Even today, I continue to fall in love with mathematics — in the sparkle of a student’s curiosity, in the elegance of a perfect solution, and in the endless patterns that connect our universe.

finding prime number or not

Advanced Prime Number Checker

Check if any number is prime - supports numbers with thousands of digits

Enter any number to check (any number of digits):

About Large Prime Numbers

The largest known prime number as of 2023 is 2^82,589,933 − 1, a number with 24,862,048 digits. It was discovered by the Great Internet Mersenne Prime Search (GIMPS).

This tool uses the Miller-Rabin primality test for large numbers, which is a probabilistic test. For numbers with more than 20 digits, we use a faster approach with fewer iterations to maintain performance.

Understanding Prime & Composite Numbers

What are Prime Numbers?

Prime numbers are natural numbers greater than 1 that have exactly two distinct positive divisors: 1 and the number itself. Examples: 2, 3, 5, 7, 11, 13, etc.

What are Composite Numbers?

Composite numbers are natural numbers greater than 1 that are not prime. They have at least one divisor other than 1 and themselves. Examples: 4, 6, 8, 9, 10, etc.

Special Cases

The number 1 is neither prime nor composite. The number 2 is the only even prime number. All other even numbers greater than 2 are composite.

Advanced Prime Number Checker Tool | Perfect for educational blogs and math enthusiasts

Prime Number Checker Online Tool (UP TO 1000)

🔢 Prime Number Checker – Learn Prime & Composite Numbers

Prime numbers are an important concept in mathematics and play a key role in number theory. This Prime Number Checker is designed to help students understand, not just identify, whether a number is prime or composite.

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📘 What is a Prime Number?

A prime number is a natural number greater than 1 that has exactly two distinct positive divisors:

• 1

• The number itself

Examples of prime numbers include:
2, 3, 5, 7, 11, 13, 17, 19, etc.

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📕 What is a Composite Number?

A composite number is a natural number greater than 1 that has more than two factors.

Examples:
4 (1, 2, 4)
6 (1, 2, 3, 6)
9 (1, 3, 9)

📌 Important:
The number 1 is neither prime nor composite.

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🛠 How to Use the Prime Number Checker Tool

1. Enter any positive whole number in the input box

2. Click on “Check if Prime”

3. The tool will instantly show whether the number is Prime or Composite

This tool is ideal for:

• Practice

• Concept revision

• Classroom demonstrations

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🧠 How the Tool Works (Concept)

The checker tests whether the number has any factors other than 1 and itself.
If such a factor exists, the number is composite. Otherwise, it is prime.

This approach helps students connect factors and divisibility with prime numbers.

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🎯 Learning Objectives

By using this tool, students will:

• Understand the definition of prime and composite numbers

• Improve number sense

• Strengthen divisibility concepts

• Develop logical thinking

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👩‍🏫 Teacher’s Note

As a mathematics teacher, I recommend students not rely only on tools, but to:

• List factors manually

• Observe patterns

• Practice identifying primes without calculators

Tools should support learning, not replace thinking.

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🔁 Practice Activity

Try checking:

• All numbers from 1 to 50

• Even numbers greater than 2

• Square numbers like 9, 16, 25

Observe the pattern and discuss your findings.

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📌 Conclusion

Understanding prime numbers builds a strong foundation for advanced topics such as HCF, LCM, algebra, and cryptography. This Prime Number Checker is a simple way to explore these ideas interactively and meaningfully.

Prime Number Checker

Explore prime and composite numbers through interactive visualization

Enter a number to check:

Explore numbers from 1 to 100:

17

Visual Representation

See how the number can be arranged in rows and columns

Understanding Prime & Composite Numbers

What are Prime Numbers?

Prime numbers are natural numbers greater than 1 that have no positive divisors other than 1 and themselves. Examples: 2, 3, 5, 7, 11, 13, etc.

What are Composite Numbers?

Composite numbers are natural numbers greater than 1 that are not prime. They have at least one divisor other than 1 and themselves. Examples: 4, 6, 8, 9, 10, etc.

Why are Prime Numbers Important?

Prime numbers are fundamental in mathematics and have applications in cryptography, computer science, and number theory. They are the building blocks of all natural numbers.

Prime Number Checker Tool - math enthusiasts