Online Calculators

Estimate monthly mortgage payments, interest, and amortization.

Calculators & Converters

Calculate payment, total interest, and payoff for a fixed-rate loan.

Calculators & Converters

Compare simple and compound interest growth on a principal.

Calculators & Converters

Solve for loan payment, principal, rate, or term from the other values.

Calculators & Converters

Build a full amortization schedule for a fixed-rate loan.

Calculators & Converters

See how extra payments shorten a mortgage and cut interest.

Calculators & Converters

Estimate a home price range from income, debts, and down payment.

Calculators & Converters

Budget rent from income and estimate total move-in costs.

Calculators & Converters

Calculate front-end and back-end debt-to-income ratios.

Calculators & Converters

Estimate purchase costs, equity, and simple property ROI.

Calculators & Converters

Compare current and refinance loan payments and break-even time.

Calculators & Converters

Estimate cash flow, cap rate, and cash-on-cash return for a rental.

Calculators & Converters

Estimate APR when upfront fees are added to a loan.

Calculators & Converters

US-oriented FHA payment estimate with upfront and annual MIP inputs.

Calculators & Converters

US VA loan payment estimate with optional funding fee.

Calculators & Converters

Estimate payments for a fixed home-equity loan.

Calculators & Converters

Estimate interest-only and amortizing HELOC payments.

Calculators & Converters

Calculate down payment amount, percent, or required savings goal.

Calculators & Converters

Compare multi-year costs of renting versus buying a home.

Calculators & Converters

Compare a cash-back deal versus a low-interest financing offer.

Calculators & Converters

Estimate a car lease payment from cap cost, residual, and money factor.

Calculators & Converters

Project investment growth with recurring contributions.

Calculators & Converters

Solve common TVM problems: PV, FV, payment, rate, or periods.

Calculators & Converters

Calculate compound interest with flexible compounding frequency.

Calculators & Converters

Solve for the interest rate given principal, payment, and term.

Calculators & Converters

Plan a savings goal with deposits and compound growth.

Calculators & Converters

Compute simple interest and maturity amount.

Calculators & Converters

Estimate certificate of deposit maturity value.

Calculators & Converters

Estimate bond price from face value, coupon, yield, and years.

Calculators & Converters

Project mutual fund growth after expense ratio drag.

Calculators & Converters

Compute arithmetic and geometric average returns from a list.

Calculators & Converters

Estimate internal rate of return from a series of cash flows.

Calculators & Converters

Calculate net present value for a discount rate and cash flows.

Calculators & Converters

Measure return on investment as gain and percentage.

Calculators & Converters

Estimate how long it takes to recover an initial investment.

Calculators & Converters

Discount a future amount to today's value.

Calculators & Converters

Grow a present amount (and optional deposits) into a future value.

Calculators & Converters

Project retirement savings with contributions and growth.

Calculators & Converters

US-oriented 401(k) growth estimate with employee and employer contributions.

Calculators & Converters

Estimate a simple defined-benefit pension from salary and years of service.

Calculators & Converters

Rough US Social Security benefit estimate from AIME and claiming age factor.

Calculators & Converters

Calculate the future value of an ordinary annuity.

Calculators & Converters

Estimate fixed payouts from a lump sum over a chosen term.

Calculators & Converters

US Roth IRA growth estimate with annual contributions.

Calculators & Converters

US traditional IRA growth estimate before tax considerations.

Calculators & Converters

Estimate a required minimum distribution using a life-expectancy divisor.

Calculators & Converters

Estimate income tax from taxable income and a user-entered effective or marginal rate.

Calculators & Converters

Convert between hourly, monthly, and annual salary figures.

Calculators & Converters

Estimate take-home pay after tax and deduction percentages you enter.

Calculators & Converters

Add or remove sales tax from a price using a rate you provide.

Calculators & Converters

Illustrate marriage bonus/penalty using simple tax brackets you enter.

Calculators & Converters

Rough estate tax estimate using a taxable estate and rate/exemption you enter.

Calculators & Converters

Estimate interest cost and payoff time for a credit card balance.

Calculators & Converters

Find the payment needed to clear a card balance by a target date.

Calculators & Converters

Estimate payoff time and interest for a single debt with fixed payments.

Calculators & Converters

Compare separate debt payments to one consolidation loan.

Calculators & Converters

See total repayment cost for a loan at a chosen payment amount.

Calculators & Converters

Estimate student loan payments and total interest.

Calculators & Converters

Project multi-year college costs with tuition inflation.

Calculators & Converters

Straight-line and declining-balance depreciation estimates.

Calculators & Converters

Calculate profit margin, markup, and selling price.

Calculators & Converters

Estimate payments for a fixed-rate business loan.

Calculators & Converters

Calculate personal loan payments and total interest.

Calculators & Converters

Estimate boat loan payments from price, down payment, rate, and term.

Calculators & Converters

General equipment/property lease payment estimate from cost and residual.

Calculators & Converters

Build a simple monthly budget and see surplus or shortfall.

Calculators & Converters

UK-oriented mortgage payment estimate using sterling defaults.

Calculators & Converters

Canadian mortgage estimate with semi-annual compounding convention.

Calculators & Converters

Calculate sale prices after one or more percent-off discounts.

Calculators & Converters

Convert an hourly wage into monthly and annual salary figures.

Calculators & Converters

Add, subtract, multiply, or divide two numbers.

Calculators & Converters

Scientific functions with degrees/radians, powers, roots, and logs.

Calculators & Converters

Measure percent error between experimental and accepted values.

Calculators & Converters

Raise a base to a power and show scientific notation when helpful.

Calculators & Converters

Convert and calculate with binary and decimal integers.

Calculators & Converters

Convert between hexadecimal and decimal values.

Calculators & Converters

Model exponential decay using half-life.

Calculators & Converters

Solve ax² + bx + c = 0 with real or complex roots.

Calculators & Converters

Compute logarithms with common, natural, or custom bases.

Calculators & Converters

Calculate square roots, cube roots, or n-th roots.

Calculators & Converters

Find the LCM of two or more integers.

Calculators & Converters

Find the GCF/GCD of two or more integers.

Calculators & Converters

List all positive factors of an integer.

Calculators & Converters

Round numbers to a chosen number of decimal places or significant figures.

Calculators & Converters

Add, multiply, transpose, and invert small matrices.

Calculators & Converters

Convert between decimal and scientific notation.

Calculators & Converters

Add, subtract, multiply, or divide large integers with BigInt precision.

Calculators & Converters

Factor an integer into primes.

Calculators & Converters

Divide integers and show quotient and remainder.

Calculators & Converters

Approximate two-tailed p-value from a z-score (normal distribution).

Calculators & Converters

Generate arithmetic or geometric sequences.

Calculators & Converters

Estimate sample size for a proportion with a chosen confidence level.

Calculators & Converters

Combine event probabilities with and/or/not operations.

Calculators & Converters

Compute mean, median, variance, and standard deviation.

Calculators & Converters

Find mean, median, mode, and range for a data set.

Calculators & Converters

Calculate nPr and nCr for selections and arrangements.

Calculators & Converters

Convert a raw score to a z-score using mean and standard deviation.

Calculators & Converters

Estimate a confidence interval for a mean with known σ (z-interval).

Calculators & Converters

Solve triangle sides and area from SSS, SAS, or ASA data.

Calculators & Converters

Calculate volumes for box, sphere, cylinder, and cone shapes.

Calculators & Converters

Find the slope and equation of a line through two points.

Calculators & Converters

Calculate area for rectangle, triangle, circle, and trapezoid.

Calculators & Converters

Calculate Euclidean distance between two points.

Calculators & Converters

Find circumference, area, diameter, or radius of a circle.

Calculators & Converters

Calculate surface area for box, sphere, and cylinder.

Calculators & Converters

Solve for a missing side of a right triangle.

Calculators & Converters

Solve a right triangle from two known sides or a side and an angle.

Calculators & Converters

Add or subtract days from a date, or find a date offset.

Calculators & Converters

Add or subtract hours, minutes, and seconds.

Calculators & Converters

Convert between hours, minutes, seconds, and decimal hours.

Calculators & Converters

Calculate worked hours between clock-in and clock-out with a break.

Calculators & Converters

Compare local times using IANA time zone identifiers.

Calculators & Converters

Measure the duration between two date-times.

Calculators & Converters

Count the number of days between two dates.

Calculators & Converters

Find the weekday for any calendar date.

Calculators & Converters

Estimate concrete volume for slabs, footings, or columns.

Calculators & Converters

Rough HVAC sizing estimate from room size and climate factor.

Calculators & Converters

Calculate area in square feet from length and width measurements.

Calculators & Converters

Estimate stair risers, treads, and total run from total rise.

Calculators & Converters

Estimate roof area and shingle squares from footprint and pitch.

Calculators & Converters

Estimate how many tiles you need for a floor or wall.

Calculators & Converters

Estimate mulch volume in cubic yards for a bed.

Calculators & Converters

Estimate gravel or crushed stone volume for a project area.

Calculators & Converters

Quick conversions for length, mass, and temperature common pairs.

Calculators & Converters

Calculate density, mass, or volume from the other two values.

Calculators & Converters

Convert common mass units or compute mass from density and volume.

Calculators & Converters

Convert between newtons and kilograms-force style weight estimates on Earth.

Calculators & Converters

Solve speed, distance, or time from the other two values.

Calculators & Converters

Calculate molarity, moles, or solution volume.

Calculators & Converters

Sum atomic weights from a simple element count list.

Calculators & Converters

Convert between Roman numerals and integers.

Calculators & Converters

Convert height between centimeters, meters, feet, and inches.

Calculators & Converters

Solve voltage, current, resistance, or power using Ohm’s law.

Calculators & Converters

Estimate single-phase DC/AC voltage drop in a conductor.

Calculators & Converters

Combine resistors in series or parallel.

Calculators & Converters

Estimate energy use and cost from power and time.

Calculators & Converters

Calculate IPv4 network, broadcast, and host range from CIDR.

Calculators & Converters

Estimate download time or required bandwidth for a file size.

Calculators & Converters

Estimate trip fuel cost from distance, efficiency, and price.

Calculators & Converters

Calculate MPG or L/100km from distance and fuel used.

Calculators & Converters

Estimate horsepower from torque and RPM.

Calculators & Converters

Estimate wheel horsepower from quarter-mile ET and vehicle weight.

Calculators & Converters

Track total miles and average distance across trips.

Calculators & Converters

Compare tire diameters and speedometer impact between sizes.

Calculators & Converters

Compute a weighted course grade from component scores.

Calculators & Converters

Approximate conversion between US, UK, and EU adult shoe sizes.

Calculators & Converters

Estimate a simple handicap differential and average handicap index.

Calculators & Converters

Estimate wind chill temperature using the NWS formula.

Calculators & Converters

Estimate heat index from temperature and relative humidity.

Calculators & Converters

Estimate dew point from temperature and relative humidity.

Calculators & Converters

Compute GDP via the expenditure approach: C + I + G + (X − M).

Calculators & Converters

Convert everyday measurement units.

Calculators & Converters

Convert metric and imperial lengths.

Calculators & Converters

Convert weight and mass units.

Calculators & Converters

Convert °C, °F, and Kelvin.

Calculators & Converters

Convert area units.

Calculators & Converters

Convert liquid and volume units.

Calculators & Converters

Convert speed units.

Calculators & Converters

Convert fixed-duration time units.

Calculators & Converters

Convert decimal and binary storage units.

Calculators & Converters

Spell out numbers in English words.

Calculators & Converters

Calculate percentages and percent change.

Calculators & Converters

Add and simplify fractions.

Calculators & Converters

Calculate the mean of a list.

Calculators & Converters

Simplify and solve ratios.

Calculators & Converters

Calculate sale price after discount.

Calculators & Converters

Add or remove VAT / tax mathematically.

Calculators & Converters

Split tips and bill totals.

Calculators & Converters

Find the difference between two dates.

Calculators & Converters

Calculate exact calendar age.

Calculators & Converters

Convert date/time between time zones.

Calculators & Converters

Estimate totaled-car settlement value.

Specialized Calculators

Estimate property sale capital gains tax.

Specialized Calculators

Calculate middle school GPA with a custom scale.

Specialized Calculators

Estimate an AP Chemistry score.

Specialized Calculators

Estimate an AP Biology score.

Specialized Calculators

Estimate an AP Calculus BC score.

Specialized Calculators

Project retirement savings with user assumptions.

Specialized Calculators

Estimate tree removal cost as a range.

Specialized Calculators

Estimate an AP English Literature score.

Specialized Calculators

Calculate college GPA from credits and grades.

Specialized Calculators

Calculate high school GPA with an editable scale.

Specialized Calculators

Credit-weighted GPA from your grade scale.

Specialized Calculators

See what you need on the final exam.

Specialized Calculators

Average scores by category weight.

Specialized Calculators

Estimate an AP English Language score.

Specialized Calculators

Estimate an AP U.S. History score.

Specialized Calculators

Estimate an AP World History score.

Specialized Calculators

Estimate an AP Psychology score.

Specialized Calculators

Estimate a car loan monthly payment.

Specialized Calculators

Estimate commission from rate and sales.

Specialized Calculators