Calculators

Rhombus calculator online free. Find the area and perimeter of a rhombus from its diagonals or from a side and angle, with formulas shown, in your browser.

Rational calculator online free. Add, subtract, multiply and divide fractions with the steps shown and answers in lowest terms, in your browser.

Substitution calculator online free. Solve two linear equations by substitution with every step shown — isolate, substitute, solve, check — in your browser.

Collatz sequence calculator online free. Follow the 3n + 1 rule from any starting number, see the full sequence, steps, and highest value, in your browser.

Infinite series calculator with steps online free. Add terms one by one, see every partial sum, and check whether the sums appear to settle, in your browser.

Piecewise integral calculator online free. Integrate a function defined in pieces, numerically, piece by piece, and add the pieces, in your browser.

Partial differentiation calculator online free. Estimate partial derivatives of a two-variable function numerically, with respect to x and y, in your browser.

Time value of money calculator online free. Work out the future value of money today, or the present value of a future amount, with compound interest, in your browser.

Long addition calculator online free. Add two whole numbers and see every carrying step, column by column from right to left, in your browser.

Law of cosines calculator online free. Find the third side of a triangle from two sides and the included angle, with full working, in your browser.

Long subtraction calculator online free. Subtract two whole numbers and see every borrowing step, column by column from right to left, in your browser.

Arithmetic sequence calculator online free. Find the nth term and the sum of any arithmetic progression from its first term and common difference, in your browser.