Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Ideal Euclidean geometry. Use one consistent length unit. Measurements and derived quantities use floating-point arithmetic. Inputs are the perpendicular legs of two known right triangles. Rotations and exchanged leg order are allowed.
Example Calculation
- First triangle leg a: 3 units
- First triangle leg b: 4 units
- Second triangle leg a: 6 units
- Second triangle leg b: 8 units
Legs 3,4 and 6,8 describe similar right triangles with scale factor 2.
Frequently asked questions
How do I use this calculator?
Enter first triangle leg a, first triangle leg b, second triangle leg a, second triangle leg b. The result updates automatically. Use Reset to restore the example values.
What method does it use?
Sort each pair of legs; compare ratios within 10⁻¹⁰ relative tolerance.. Ideal Euclidean geometry. Use one consistent length unit. Measurements and derived quantities use floating-point arithmetic. Inputs are the perpendicular legs of two known right triangles. Rotations and exchanged leg order are allowed.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.