Triangle Calculator (3 Sides)
Math ToolsArea, angles and type from three sides
FreePrivateInstant
Similar tools you may like
History
All history →Triangle Calculator (3 Sides) — at a glance
Area, angles and type from three sides.
Your text or values
Run
Instant result
How to use it — step by step
Just your input — nothing to install or sign up for.
1
Enter your values
Fill in the boxes. Sample values are already there so you can see how it works.
2
Calculate
Press the button to get your answer instantly.
3
Read the result
The main answer is shown in a large card with extra details below it.
4
Copy it
Use the copy button to save the result anywhere.
Pro tips
Small things that make the result better.
✦Two sides together must be longer than the third.
✦Area uses Heron’s formula.
Quick facts
Freeno signup, no limit
Instantresult in a moment
Privatenothing is uploaded
Any devicephone, tablet or PC
Frequently Asked Questions
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.
Is this tool really free?+
Yes — completely free, no signup, no watermark and no usage limit.
More Free Tools
Guides you might like
All guides →Pythagorean Theorem CalculatorPythagorean theorem: the 3-4-5 trick, ladders, TV sizes and how to check a right angleConfidence Interval Calculator (Mean)Confidence intervals explained: what 95% really means and how sample size shrinks itZ-Score CalculatorZ-score explained: compare anything on one scale and spot outliersPercent Error CalculatorPercent error: how far off is your measurement, and how it differs from percent change