geometry calculator

45-45-90 Triangle Calculator

45-45-90 Triangle Calculator for shape comparison, sketching, and formula checking when you want a fixed formula answer without improvising the math by hand.

Important Use Notice

Informational calculator only. Verify important outputs independently before legal, tax, medical, engineering, safety-critical, contractual, employment, or compliance use.

Estimate

Enter job values, review the estimate, then use the decision hints before ordering or quoting.

Estimate Results

Enter values to see the result.

Formula

hypotenuse = leg x sqrt(2)

A 45-45-90 triangle has equal legs, so the hypotenuse scales by square root of 2.

The area is one-half of leg squared.

Example

6 units gives Hypotenuse 8. 4853, Area 18.

Check

Mixing units, scales, or coordinate conventions across leg before calculating hypotenuse and area.
Rounding too early when the result still feeds another geometry or algebra step.

Next Step

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