Calculate triangle area three ways — base and height, three sides (Heron), or two sides plus included angle. Pick the method matching your knowns. Numbers never leave your device — every calculation runs locally in your browser.
Content reviewed October 2026 · About Toolzum
Compute your overall course percentage from comma-separated assignment grades and their matching weights — Exam Heavy presets included. Numbers never leave your device — every calculation runs locally in your browser.
Calculate the exact duration between two times. Handles overnight time spans and displays results in hours, minutes, and seconds. Numbers never leave your device — every calculation runs locally in your browser.
Calculate the percentage difference between any two numbers. Useful for comparing data sets, prices, and measurements. Numbers never leave your device — every calculation runs locally in your browser.
Calculate body fat percentage using the US Navy circumference method. Enter waist, neck, height, and hip measurements. Health data never leaves your device — every calculation runs locally in your browser.
Calculate Annual Recurring Revenue from subscription revenue, expansion revenue, and churn. Essential for SaaS businesses tracking growth. Numbers never leave your device — every calculation runs locally in your browser.
Base-height, three sides (Heron), or two sides plus included angle.
Any consistent unit — output squares it automatically for your convenience.
Different knowns need different formulas — pick what you have.
No — calculation runs locally in your browser, free with no signup.
Half times base times height: 0.5 × 10 × 6 = 30 square units. Select Base & Height with 10 and 6 to retrace it.
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