• Triangle Calculator 1
  • Triangle Calculator 2
  • Triangle Calculator 3
  • Triangle Calculator 4

Triangle Calculator

Solve triangles by entering two sides and one angle, two angles and one side or three sides to find remaining values as used in trigonometry.
Angles are available in degrees, radians, grads or degrees with minutes and seconds.

The ▲² button shows second solution if one exists (ambiguous case).

Translation errors ? Please let us know through email.

Category : Tools

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Reviews (30)

Jas. P. Oct 4, 2019     

Simple, does what it sets out to do admirably, ads dont cover up anything important, keyboard doesnt cover up any of the input boxes; overall an amazing app.

Mic. L. Oct 31, 2021     

Very useful for solving triangles or double checking my own guess. It's also fun to just play with odd angles and lengths of sides....

Syn. 9. May 24, 2020     

Great app, but sometimes it has an odd glitch where it keeps telling you it doesnt have enough info when it does. Hitting Clear fixes this.

Gab. O. Feb 19, 2021     

It good but I wish we can change the letters to the one I have on my problem but overall it still a good app all they need to add is an update where they let you change the letters

Lea. w. S. /. Ս. Ս. հ. Jun 18, 2019     

Can you do it for inscribed circles and inscribed triangles too please 😌! It's almost no effort. Just a single equation added to it.

Bre. M. Jan 12, 2020     

It has shown itself to be incapable of finding the angles for a 3-4-5 triangle. This is ludicrous! Uninstalled for developers' incompetence! Losers!

Hay. B. Apr 2, 2021     

Best trig app. Others are cluttered and keypads that hide info. This is clear and user friendly.

Cal. T. Aug 18, 2020     

I entered the length of the 3 sides and hit the = sign. The response was "not enough information".

red. b. Nov 7, 2019     

Totally useless! Keeps asking for more information. If I had more information I wouldn't need it!

ale. d. Feb 19, 2021     

Triangles only need three points of information to solve all the angles and side lengths. This app is too stupid to do that.

Leo. M. Nov 6, 2020     

I'm a Quality Assurance inpector and is very handy. I use it very often and it makes my job a lot easyer.

A. G. u. Sep 15, 2018     

I put in 2 dimensions sides of a basic right angle triangle becauae i wanted to know the length of the hypotenuse and this app wanted more information!!!

A. G. u. Oct 13, 2018     

Very easy to use. No need to memorise the formulas. Great app

Jef. T. Feb 15, 2020     

I do not like an app where advertising is on the screen when you are trying to use the app. Do not recommend this app for this reason.

Vin. H. Dec 23, 2021     

I think this saves me from having to get out the calculator every time.

Col. T. Mar 20, 2022     

Quick and easy, what more could you want.

Rob. P. B. Apr 8, 2021     

Works well. And, app can be moved to external SD memory

Nei. P. Mar 24, 2021     

Does just what it is supposed to do. Plenty of options for various types of calculations. Easy to use.

Ale. R. Jul 16, 2021     

a very good app but the developer has an error. If you know the lenghts of each the 3 sides of "any" triangle. You should be able to calculate the area using the "Henron" formula in which S=(a+b+c)/2. then Area= (S*(S-a)*(S-b)*(S-c))^0.5 Please update your app with this.

Ste. R. Oct 13, 2020     

Doesn't do decimal places. 4 degree angle with 2" length will give you a 2" hypotenuse? Give me some decimals. 4, preferably.

Bil. S. Apr 15, 2019     

Simple to use, get triangle Information quickly and easily!

Mat. S. Sep 16, 2021     

Great app for calculating the height of trees. Every arborist should have this.

sco. b. Mar 22, 2021     

Good if you need to calculate a diagonal length and things like that...

Hen. M. Aug 13, 2021     

just what I needed, simple and intuitive for measuring heights!

And. S. Mar 15, 2019     

works great. would be cool if you could show the equation with the answer.

A. G. u. Jan 11, 2019     

Quite handy in the tool & die trade, I use trigonometry and this app every single day.

Pet. S. Jul 20, 2021     

Easy to use, and accurate. What else can I say other than I highly recommend it.

Cla. F. Dec 17, 2018     

Can't calc side of equilateral triangle given altitude.

Tho. W. Mar 19, 2022     

Does not go backwards it would be nice if you could enter the C hypotenuse value and get the side length A or B value

Mar. K. Mar 7, 2019     

I like it but I wanted to buy an ad-free version but can't find it anywhere.