What do you need to calculate?
72 calculators for math, physics, money, health and unit conversion. Search for the one you need, or open a worked example.
Worked examples
Tap a line to open the calculator- 15% of 240 36 Percentage Calculator
- 9th grade, fall 2026 Class of 2030 Graduation Year Calculator
- 150 km in 2.5 hours 60 km/h Speed Calculator
- $79.99 LEGO set, 1,100 pcs $0.073/pc LEGO Price Per Piece Calculator
- BMI at 180 cm and 75 kg 23.1 BMI Calculator
- 17 mod 5 2 Modulo Calculator
Every calculator, by subject
The full list, A to Z within each subject. A subject heading opens its category page, where every calculator has a short description.
Mathematics 34
- Arithmetic Sequence
- Average
- Binary
- Coterminal Angle
- Cross Product
- Cylinder Volume & Area
- Diagonalize Matrix
- Exponent
- Factorial
- GCD
- Geometric Mean
- Golden Ratio
- Harmonic Mean
- Inverse Tangent
- Law of Cosines
- LCM
- Linear Interpolation
- Logarithm
- Long Division Remainder
- Matrix
- Mixed Number
- Modulo
- Nth Root
- Orthocenter
- Percentage
- Percent Error
- Proportion
- Pythagorean Theorem
- Radical
- Rate of Change
- Rounding
- Standard Deviation
- Unit Rate
- Weighted Average
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<script src="https://manycalculators.com/widgets.js" async></script>About ManyCalculators.com
ManyCalculators.com is a collection of free online calculators. Most people come here with one question, such as how much a 15% discount takes off a price or which year a student will graduate, and they want the answer without signing up or installing anything. Every page puts the calculator at the top, so you can enter your numbers and see the result straight away.
Under each calculator you'll find the formula it uses, a short guide to the inputs, worked examples and answers to common questions. Students use these pages to check homework and to see how a result was reached. Other visitors usually need a single number, like a loan payment, a BMI or a unit conversion.
The calculations run in your browser, which keeps pages fast on a phone as well as on a laptop. The collection covers math, physics, finance, health, unit conversion, dates, text, random generators, sports, science, IT, gaming and construction. If a calculator you need is missing, tell us about it.