Compute circle area and circumference from the radius — geometry homework solved. Enter r=5 and read both measures at once — free, local, no signup.
Content reviewed October 2026 · About Toolzum
Compute simple probability as favorable outcomes divided by total outcomes — coin flips, dice rolls, card draws. See 3 in 10 read as 30.0% instantly — free, local, no signup.
Solve geometry essentials — areas, perimeters, volumes, angles — with diagrams described. Cover homework shapes in one tab — free, local, no signup.
Compute distance, midpoint, and slope between coordinate points — geometry essentials. Get all three from two points — free, local, no signup.
Crop the visual area of your MP4 or WebM video directly in the browser with 9:16, 1:1, 16:9 presets or custom dimensions with X/Y offsets. Free to start with no signup.
Compute gross margin from revenue and costs — know exact profitability. A $30 sale at $20 cost margins 33% — free, local, no signup.
Halve it yourself first, then enter the radius: d=10 means r=5, area ≈ 78.5. The tool accepts radius only.
Always alongside area — one radius entry shows both to one decimal.
No — decimals only (25π shows as 78.5). Copy π-exact forms for homework by hand.
No — math runs locally in your browser. Numbers never leave your device.
Geometry Calculator
Solve geometry essentials — areas, perimeters, volumes, angles — with diagrams described. Cover homework shapes in one tab — free, local, no signup.
Triangle Area Calculator
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.