Mathlean · Online math workspace
Summation calculator
Evaluate finite indexed sums and supported infinite sums in native sigma notation.
How to use this calculator
Change the summand, index or bounds. The starter sums squares from 1 through 10.
Tap the math below to edit it and see the result. Once a result is ready, press Tab on a hardware keyboard to accept it. Outside a matrix, Return completes the line; the phone math keyboard has the same Return action.
Try it here
Interactive tools require JavaScript. You can read the guide and example without it.
What to know
Infinite sums require convergence. An unevaluated result is not evidence that a series converges.
Mathlean combines visual mathematical input with computation and canvas tools. Results depend on the expression and available engine support; check important answers independently.