Can this payment fit my budget?
Estimate your monthly loan payment, then compare a second scenario with the same term. Include fees and household expenses before deciding what is affordable.
Estimate a loan payment →
Small questions. Clear
answers.
Life has numbers.
Life has numbers.
Make them make sense.
Free online calculators for money, math, health and everything in between. Explore the formula, try your own numbers, and understand the result.
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Your everyday calculator
Online calculator
Memory emptyReady
Use the keypad or type an expression and press Enter. Escape clears the display. Scientific function buttons apply to the current value; DEG/RAD controls the sin, cos and tan buttons.
Percentage and memory buttons
% divides the displayed value by 100. For example, calculate 200 × 10 / 100 for ten percent of 200. M+ adds the displayed value to memory, M− subtracts it, MR recalls it and MC clears memory. Memory lasts until you reload this page. CE clears the last numeric entry; AC clears the calculation.
Start with a question
What are you working out?
What does that percentage mean?
Enter the part and the whole in a percentage tool. Check which number is the base: a discount on an original price and an increase on a new price answer different questions.
Work out a percentage →How should I read this estimate?
BMI is a screening measure based on height and weight. It does not describe muscle mass or diagnose health. Read the tool’s limitations and seek qualified advice when interpretation matters.
Explore the BMI estimate →Popular calculators
View all 417
FinancialMortgage CalculatorUse the mortgage tool with principal / amount, annual interest rate (%).
See results, the formula and a worked example.HealthBMI CalculatorUse the bmi tool with measurement system, weight (kg or lb). See results,
the formula and a worked example.MathPercentage CalculatorUse the percentage tool with percentage, base value. See results, the
formula and a worked example.EverydayAge CalculatorUse the age tool with birth date, age on date. See results, the formula and
a worked example.FinancialCompound Interest CalculatorUse the compound interest tool with principal / amount, annual interest
rate (%). See results, the formula and a worked example.FinancialLoan CalculatorUse the loan tool with principal / amount, annual interest rate (%). See
results, the formula and a worked example.HealthCalorie CalculatorUse the calorie tool with measurement system, weight (kg or lb). See
results, the formula and a worked example.MathScientific CalculatorUse the scientific tool with expression. See results, the formula and a
worked example.EverydayTip CalculatorUse the tip tool with bill before tip, tip (%). See results, the formula
and a worked example.
Explore by category
287 toolsFinancial calculatorsPlan borrowing, saving, investing and household budgets. Compare scenarios
using your own rates, currency and assumptions.44 toolsMath calculatorsExplore arithmetic, algebra, geometry, statistics and number theory with
transparent formulas and worked examples.31 toolsHealth calculatorsUnderstand adult screening measures, energy estimates and calendar-based
health calculations. These tools explain estimates without making
diagnoses.8 toolsConversion calculatorsConvert measurements, temperature, fuel economy, sizing and data-transfer
units. Check the exact unit conventions before comparing results.24 toolsEveryday calculatorsWork out dates, hours, grades, material quantities, energy costs and other
practical questions using local browser calculations.15 toolsEngineering calculatorsEstimate geometry, electrical quantities, mechanics and chemistry with
explicitly labeled units. Verify designs against applicable standards.8 toolsOther calculatorsUse encoding tools, random generators, IPv4 subnet calculations and other
specialist utilities. Each tool states its scope and limitations.
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Financial calculators
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FinancialSIP CalculatorEstimate monthly SIP growth, invested amount and potential returns. Compare
beginning or end-of-month contributions using an editable annual
return.FinancialLumpsum CalculatorProject a one-time investment's future value and growth using your
amount, investment duration and assumed annual effective return.FinancialStep Up SIP CalculatorCalculate a SIP with yearly contribution increases. View total invested,
projected growth and a year-by-year step-up investment table.
Math calculators
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MathScientific CalculatorUse the scientific tool with expression. See results, the formula and a
worked example.MathBasic CalculatorUse the basic tool with expression. See results, the formula and a worked
example.MathFraction CalculatorUse the fraction tool with first numerator, first denominator. See results,
the formula and a worked example.
Health calculators
Browse category
HealthBMI CalculatorUse the bmi tool with measurement system, weight (kg or lb). See results,
the formula and a worked example.HealthOverweight CalculatorUse the overweight tool with measurement system, weight (kg or lb). See
results, the formula and a worked example.HealthAnorexic BMI CalculatorUse the anorexic bmi tool with measurement system, weight (kg or lb). See
results, the formula and a worked example.
Everyday calculators
Browse category
EverydayAge CalculatorUse the age tool with birth date, age on date. See results, the formula and
a worked example.EverydayDate CalculatorUse the date tool with start date, days to add (negative subtracts). See
results, the formula and a worked example.EverydayTime CalculatorUse the time tool with hours, minutes. See results, the formula and a
worked example.
More than a number
See how your answer is made.
Every calculator includes its inputs, a calculation method and a worked example. Check the assumptions, change one value, and compare what happens.
01Choose the toolMatch its scope to your question.
02Enter your valuesKeep units and periods consistent.
03Read the explanationUnderstand the formula and limits.
Our calculation methodology →Calculate with context
CalculatorsOnline brings practical calculation tools into one searchable directory. Use it to compare a loan, check a percentage, understand a health estimate, plan a project or convert a measurement. Each calculator shows what it needs, how the calculation works and which assumptions affect the answer.
Calculations run locally in your browser, with no account required. Financial tools support selectable currencies and regional number formatting. Exchange rates and jurisdiction-dependent financial assumptions are entered by you, so a default is never presented as a live market rate or a universal tax rule.
Why CalculatorsOnline?
Free to useNo signupMobile friendlyLocal calculationsGlobal number formatsVisible methodology
Common questions
Do I need an account?
No. All calculator pages are available without an account. Favorites and recent calculator names stay in this browser.
Are rates live?
No live financial API is configured. Enter your own interest rates, exchange rates and tax assumptions. Check the method shown on each calculator.
Can a calculator replace professional advice?
No. Financial and health results are estimates, and engineering arithmetic does not establish compliance with a design standard. Use qualified advice where interpretation matters.
Which languages are available?
The content is currently in English. Regional number formatting is supported; changing a number format does not translate an article. The translation architecture allows reviewed languages to be added later.