Calculators that solve for any value

Fill in what you know — we calculate the rest and show the working. 610+ free calculators, no sign-up.

EMIBMIkW to Amps4–20 mA ScalingGSTPercentageOhm's LawKg to Lbs

610+calculators
17categories
Dailynew tools
Try it: Ohm's lawOpen full calculator →
calculated
calculated
Type in any field to change it. Press × on a value to calculate that field instead.
Powered by Zenta Calculator

Popular calculators

Browse by category

610 calculators in 17 categories
Biology20 calculatorsChemistry44 calculatorsConstruction20 calculatorsConversion36 calculatorsEcology21 calculatorsElectrical41 calculatorsElectronics52 calculatorsEngineering76 calculatorsEveryday life22 calculatorsFinance49 calculatorsFood20 calculatorsHealth25 calculatorsMath46 calculatorsPhysics66 calculatorsSports20 calculatorsStatistics34 calculatorsOther18 calculators

New this week

Fresh calculators added every day

4–20 mA ScalingAngleCapacitor EnergyCell Doubling TimeCombinationControl ChartCubic EquationDew PointDilutionDNA / RNA ConcentrationDoppler EffectFlyback TransformerHorizontal Tank VolumeLC Filter

Solve for any value

Every field can be an input or the answer — enter what you know.

See the working

Formulas, steps and worked examples on every page.

Any units

Metric and imperial, with your local currency and number format.

Free, no sign-up

Works on any phone or computer, instantly.

Free online calculators for engineering, science, math and everyday life

Zenta Calculator brings together 610 free calculators — from electrical, electronics and instrumentation and process engineering to physics, chemistry, math and statistics, plus finance, health and unit conversion. Each calculator explains the formula, shows a worked example and lets you solve for any unknown.