Online Calculators45 free tools

Estimate annual percentage rate from principal, fees, term, and payment. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Estimate vehicle loan payments, total interest, taxes, and financed fees. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Calculate the arithmetic mean of a numeric list and review its count, minimum, and maximum. Paste up to 100,000 values using common separators.

Estimate basal metabolic rate with established adult equations. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Estimate body-fat percentage from circumference measurements. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Count weekdays between two dates with optional excluded holidays. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Estimate daily energy needs from age, body measurements, sex, and activity level. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Add or subtract years, months, weeks, and days from a calendar date. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Count the calendar days between any two dates, including across leap years. Use it to work out deadlines, project durations, or days until an event.

Estimate payoff time and interest from balance, rate, and monthly payment. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Enter an original price and a discount from 0 through 100 percent to calculate the amount saved and the resulting price before taxes or fees.

Add, subtract, multiply, divide, simplify, and compare fractions. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Calculate a weighted grade point average from each course's grade and credit hours. Add any number of courses to estimate a semester or cumulative GPA.

Calculate the time between a start and an end, minus any break, shown as hours and minutes or decimal hours. Suited to timesheets, shift lengths, and hourly billing.

Compare several commonly cited height-based reference formulas. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Estimate the monthly installment (EMI) on a fixed-rate loan from the amount, interest rate, and term. Also shows total interest and the full repayment amount over the life of the loan.

Calculate markup percentage and selling price from cost and profit. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Estimate monthly principal and interest on a fixed-rate home loan from the purchase price, down payment, rate, and term. Budget taxes and insurance separately for the full picture.

Estimate a fertile window from cycle dates and average cycle length. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Estimate a due-date window from a reported menstrual date or conception date. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Test primality and factor bounded whole numbers. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Calculate a simple event's probability from favorable outcomes and the total number of equally likely possibilities, with percentage and reduced odds in both directions.

Calculate gross profit, margin percentage, cost, or selling price. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Solve real or complex roots for a quadratic equation. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Generate cryptographically sourced whole numbers within an inclusive safe-integer range. Request up to 1,000 results and optionally prevent repeated values.

Simplify ratios and solve a missing value in a proportion. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Project a savings balance from contributions, time, and an assumed return. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Calculate return on investment, gain, and annualized return. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Calculate pace, elapsed time, or distance for a run or walk. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Convert annual, monthly, weekly, daily, and hourly pay rates. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Enter a pre-tax subtotal and the applicable non-negative tax rate to calculate tax and final total. You supply the rate; the tool performs no jurisdiction lookup.

Project savings growth from a starting balance and recurring deposits. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Evaluate bounded arithmetic, trigonometric, logarithmic, and power expressions. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Calculate principal, simple interest, and ending balance over time. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Calculate mean, variance, and population or sample standard deviation. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Estimate total daily energy expenditure from BMR and activity level. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Find elapsed time between two clock values across midnight when needed. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Compare a date and time across browser-supported IANA time zones. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.

Add or remove a configurable value-added-tax percentage. Use the focused browser controls, compare the result with the source, and check the page's processing note before working with sensitive material.