Calculators

Practical calculators for everyday decisions

Use transparent formulas and clear inputs to estimate areas, costs, payments, dates, and more. 164 free tools across 7 categories.

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24 calculators

Plan area and material quantities for practical building projects.

15 calculators

Calculate ages and useful differences between calendar dates.

17 calculators

Calculate voltage, current, resistance, and wire specifications.

29 calculators

Estimate costs, payments, tips, and common personal-finance figures.

17 calculators

General-purpose health measurements with clear limitations.

28 calculators

Fast everyday percentage and arithmetic calculations.

35 calculators

Physics calculations for motion, forces, and energy.

Every calculator shows the formula used so you understand how results are calculated.

No sign-ups, no waiting. Enter your values and get results immediately.

Works perfectly on phones, tablets, and desktops for on-the-go calculations.