Tool category
Free Online Calculator Tools
Focused calculators for everyday math — percentage calculations, fraction arithmetic, investment growth, and number theory. Get step-by-step results instantly in your browser.
5 tools in this category
Percentage Calculator
Calculate percentages three ways: what is X% of Y, what percent is X of Y, and percentage change. Instant results — browser-only, free.
Open toolFraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step working shown. Simplifies results automatically — free, browser-only.
Open toolCompound Interest Calculator
Calculate compound interest on any investment. Set principal, rate, frequency, and time — see total value, interest earned, and year-by-year breakdown — browser-only.
Open toolScientific Calculator
Full-featured scientific calculator in your browser. Trigonometry, logarithms, powers, factorial, degree/radian toggle — keyboard and click supported.
Open toolGCD & LCM Calculator
Calculate the GCD (Greatest Common Divisor) and LCM (Lowest Common Multiple) of any numbers with step-by-step working — browser-only, free.
Open toolHow this category works
Calculator tools provide clean, focused interfaces for common math problems people solve repeatedly — percentages, fractions, compound interest, greatest common divisors, and scientific calculations — all without needing a physical calculator or spreadsheet.
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Frequently asked questions
Do calculators show step-by-step working?
Yes. The fraction calculator shows each operation step. The compound interest calculator breaks down the principal, interest earned, and effective rate.
How accurate is the compound interest calculator?
It uses standard financial compound interest formulas with daily, monthly, quarterly, or annual compounding options.
Can the scientific calculator handle trigonometry?
Yes. sin, cos, tan, log, ln, square root, powers, and factorial are all supported in degree and radian mode.