Popular Calculators workflows

Direct links to four high-demand tools in this category.

Remainder Calculator Number Sequence Calculator Percent Difference Calculator Graphing Calculator

62 tools

Calculators

Everyday and math calculators keep their focused inputs while legacy pages gain formula visibility and reusable local snapshots.

Calculate → inspect formula → copy/save scenario → compare

Everyday and math calculators keep their focused inputs while legacy pages gain formula visibility and reusable local snapshots.

Everyday calculations

Quick arithmetic, tips, discounts, averages and focused totals.

CalculatorEnter an expression and calculate when ready. Scientific functions and degree/radian controls stay available without crowding everyday arithmetic.Tip CalculatorEnter the bill, choose a tip rate, and set the party size to see the total and per-person amount immediately.Discount CalculatorEnter the original price and discount to see what you pay and save; open advanced options only for stacked discounts, tax, or reverse calculations.Average CalculatorPaste a list of numbers to see the mean immediately, then inspect sum, count, median, range, standard deviation, related means, and a reusable sorted dataset.Sum CalculatorPaste numbers separated by commas or spaces to calculate their sum.Rounding CalculatorEnter a number and precision to round it instantly.

Percentages & ratios

Choose the intent carefully: percent-of, change, difference, ratio and reverse-percent questions use different denominators.

Percentage CalculatorSolve the common percentage questions in one place, with live answers, the formula filled in with your numbers, quick scenarios, copy, and local history.Percentage Change CalculatorCompare an old value with a new value and get the percentage change instantly.Percent Difference CalculatorEnter two values and see their percent difference immediately. Neither value is treated as the baseline.Percentage Increase CalculatorEnter old and new values to calculate the percentage increase.Percentage Decrease CalculatorEnter old and new values to calculate the percentage decrease.Ratio CalculatorEnter two ratio terms. The calculator reduces decimal values without rounding them to arbitrary millionths, shows quotient and percentage context, scales the ratio, and can divide a total into proportional shares.

Roots, number rules & advanced math

Use focused calculators when the rule itself matters, then inspect the formula and current calculation summary.

Square Root CalculatorEnter a real number to calculate its principal square root. Integer inputs up to 1 trillion also get an exact simplified radical, perfect-square status, both real roots when applicable, and a square-back check.Cube Root CalculatorEnter a positive or negative value to find its cube root.Factorial CalculatorEnter a whole number and calculate n! instantly in the browser.Modulo CalculatorEnter an integer and modulus to see a mod n immediately, including how negative inputs differ from signed remainder.Remainder CalculatorEnter a dividend and divisor to see the quotient and remainder immediately, including the negative-number convention.Scientific CalculatorEvaluate real-number scientific expressions locally with trig, inverse trig, hyperbolic, logs, roots, powers, combinatorics, modulo, constants, memory, and result reuse.

All Calculators

Calculators

Calculator

Use a keyboard-friendly basic and scientific calculator for arithmetic, percentages, parentheses, powers, roots, logarithms, and trigonometry.

Calculators

Tip Calculator

Calculate tip amount, bill total, and per-person split from a bill and tip rate, with optional tax basis, currency display, and rounding controls.

Calculators

Percentage Calculator

Calculate percent of a number, what percent one value is of another, percent change, reverse percentages, and common add/subtract percentage cases with formulas shown.

Calculators

Percentage Change Calculator

Calculate percentage increase or decrease between two values.

Calculators

Discount Calculator

Calculate sale price and savings from an original price and discount, including stacked discounts, optional tax, and reverse discount calculations.

Calculators

Average Calculator

Calculate an arithmetic mean with live dataset statistics, median, min/max, range, standard deviation, sorted values, copy, and CSV export.

Calculators

Ratio Calculator

Simplify ratios exactly from integer or decimal inputs, scale equivalent ratios, compare quotients and percentages, and split a total by the current two-part ratio.

Calculators

Square Root Calculator

Calculate principal square roots with exact radical simplification for integers, perfect-square detection, complex notation for negative inputs, precision controls, and numeric verification.

Calculators

Percent Difference Calculator

Compare two non-negative values with the symmetric percent-difference formula, absolute difference, average, ratio, visual comparison, and worked formula.

Calculators

Scientific Calculator

Use a polished browser scientific calculator with grouped functions, editable expressions, DEG/RAD modes, precision controls, memory actions, keyboard input, formats, and reusable history.

Calculators

Factorial Calculator

Calculate n factorial for a non-negative whole number.

Calculators

Modulo Calculator

Calculate non-negative mathematical modulo with quotient, range, programming-style remainder comparison, residue visualization, and exact identity.

Calculators

Remainder Calculator

Find integer quotient, signed remainder, Euclidean remainder, and the division identity for any integer dividend and nonzero divisor.

Calculators

Rounding Calculator

Round a number to a chosen number of decimal places.

Calculators

Circumference Calculator

Calculate a circle circumference from radius or diameter.

Calculators

Percentage Increase Calculator

Calculate percentage increase from an old value to a new value.

Calculators

Percentage Decrease Calculator

Calculate percentage decrease from an old value to a new value.

Calculators

Percent to Decimal Calculator

Convert a percentage to a decimal instantly.

Calculators

Decimal to Percent Calculator

Convert a decimal number to a percentage instantly.

Calculators

Cube Root Calculator

Calculate the real cube root of a number.

Calculators

Absolute Value Calculator

Find the absolute value of a number.

Calculators

Sum Calculator

Add a list of numbers instantly.

Calculators

Graphing Calculator

Plot multiple functions with pan, zoom, value tables, and browser-canvas graphing controls.

Calculators

Aspect Ratio Calculator

Calculate aspect ratio, missing dimensions, and resized dimensions.

Calculators

Algebra Calculator

Solve many one-variable equations numerically, simplify expressions, or evaluate expressions with x and y values.

Calculators

Derivative Calculator

Differentiate supported expressions symbolically through fifth order and optionally evaluate the derivative at a point.

Calculators

Percent Off Calculator

Calculate a sale price and savings from a percentage discount.

Calculators

Trigonometry Calculator

Calculate trig functions, inverse trig, exact common-angle values, and right-triangle sides and angles.

Calculators

Pace Calculator

Calculate running pace, finish time, or distance with race presets, speed conversion, and split planning.

Calculators

Percent Error Calculator

Calculate percent error between an observed and accepted value.

Calculators

Root Calculator

Calculate square, cube, and nth roots.

Calculators

Number Sequence Calculator

Generate arithmetic or geometric sequences and calculate the nth term and sum.

Calculators

Reverse Percentage Calculator

Find an original value from a final value and a known percentage increase or decrease.

Calculators

Percentage Point Calculator

Compare two percentages in percentage points, basis points, and relative percent change.

Calculators

Percentage Split Calculator

Split a total amount across multiple percentage shares and track any remainder.

Calculators

Successive Percentage Change Calculator

Apply multiple percentage increases or decreases in sequence and measure the net effect.

Calculators

Tax and Tip Calculator

Calculate sales tax, tip, total, and equal per-person split from one bill.

Calculators

Percent to Ratio Calculator

Convert a percentage into a simplified ratio with decimal and fraction context.

Calculators

Ratio to Percentage Calculator

Convert a two-part ratio into a percentage with a clear formula.

Calculators

Percentage Recovery Calculator

Find the percentage gain required to recover from a percentage loss.

Calculators

Percent Contribution Calculator

Calculate how much one amount contributes to a total as a percentage.

Calculators

Roman Numeral Arithmetic Calculator

Add, subtract, multiply, or divide Roman numerals.

Calculators

Stacked Discount Calculator

Apply multiple percentage discounts in sequence and find the effective total discount.

Calculators

Reverse Discount Calculator

Find an original price from a sale price and percentage discount.

Calculators

Pace to Speed Converter

Convert running pace between min/km, min/mile, km/h, and mph.

Calculators

Running Split Calculator

Build even-pace running splits from a race distance and goal time.

Calculators

Run-Walk Pace Calculator

Calculate the combined pace of repeating run and walk intervals.

Calculators

Adding Machine Calculator

Use a running-tape adding machine for sequential arithmetic, audit-friendly totals, and copyable transaction history.

Calculators

RPN Calculator

Calculate with Reverse Polish Notation using a visible four-level stack and keyboard-friendly operations.

Calculators

Pythagorean Triples Calculator

Generate primitive Pythagorean triples up to a chosen hypotenuse.

Calculators

Hypotenuse Calculator

Calculate a right triangle hypotenuse from two positive legs.

Calculators

Perfect Square Calculator

Check whether a non-negative whole number is a perfect square and find the nearest perfect squares.

Calculators

Square Root Simplifier

Simplify an integer square root into exact radical form.

Calculators

Square Root of Fraction Calculator

Calculate and simplify the square root of a fraction.

Calculators

Square Root Long Division Calculator

Find a square root with the digit-by-digit long-division method.

Calculators

Equivalent Ratio Calculator

Create an equivalent ratio by multiplying both terms by the same scale factor.

Calculators

Ratio Scaling Calculator

Scale a ratio to a target first or second term.

Calculators

Divide in a Ratio Calculator

Split a total into shares using two or more ratio parts.

Calculators

Ratio Comparison Calculator

Compare two ratios exactly using cross multiplication.

Calculators

Ratio to Fraction Calculator

Convert a two-part ratio into quotient and part-of-whole fractions.

Calculators

Divisibility Calculator

Check exact integer divisibility while connecting the result to factors, common factors, GCF, coprime checks, multiples, and prime-number tools.

Calculators

Modular Exponentiation Calculator

Calculate a^b mod n efficiently with exact integer arithmetic.