Your Trusted Calculation Partner

Mortgage Calculator

Monthly payment from loan amount, APR, and term.

Amortization Calculator

Full schedule: principal, interest, and balance each month.

Mortgage Payoff Calculator

Extra payments: time saved and interest saved.

Refinance Calculator

Plan a refinance with fees, points, cash-out, and side-by-side loan comparison.

House Affordability

Max home price from income, debts, taxes, and insurance.

Rent Calculator

Affordable rent from gross income and rent-to-income percentage.

Debt-to-Income Ratio

Back-end and housing DTI from income and monthly debts.

Auto Cash Back

Compare a dealer rebate versus a lower APR on your loan.

Auto Loan Calculator

Car payment and total interest from price, down payment, and rate.

Auto Lease Calculator

Monthly lease from cap cost, residual, money factor, and term.

Retirement Calculator

Nest egg vs goal, savings to a target, withdrawals, and how long savings last.

401(k) Calculator

Balance at retirement and distributions from salary, match, raises, and returns.

Rental Property Calculator

Calculate rental property investment returns, cash flow, ROI, and mortgage analysis.

APR Calculator

Calculate the true cost of loans including fees and points to reveal the real APR.

VA Mortgage Calculator

VA loan calculator for veterans, service members, and eligible spouses with VA guarantee.

Compound Interest Calculator

Lump-sum growth, compounding frequency, and APY.

CD Calculator

Certificate of deposit maturity and interest by rate and term.

Bond Calculator

Bond price from YTM or approximate YTM from market price.

Interest Rate Calculator

Solve for return on savings or APR from loan payment.

Investment Calculator

Growth with periodic contributions and compounding.

Finance Calculator

Compound frequency, monthly deposits, ending balance and growth.

Mutual Fund Calculator

NAV growth, shares, dividends, fees, and projected value for mutual fund investments.

Average Return Calculator

Arithmetic, geometric, and compound annualized returns for multiple investment periods.

IRR Calculator

IRR and NPV for cash flow sequences, including fixed and irregular cash flows.

ROI Calculator

Return on investment percentage and annualized ROI from cost and gain.

Payback Period Calculator

Payback period, discounted payback, average return, and investment schedules.

Present Value Calculator

Present value of future money or periodical annuity payments.

BMI Calculator

Body mass index from height and weight (metric or US).

Calorie Calculator

Estimated daily calories by sex, age, size, and activity.

Body Fat Calculator

Estimate body fat percentage using US Navy circumference formulas.

Army Body Fat Calculator

2023 Army one-site abdomen tape method with maximum allowable % by age.

Lean Body Mass Calculator

Compare Boer, James, Hume, and Peters LBM estimates from weight and height.

BMR Calculator

Basal metabolic rate and daily calories by activity level.

Pregnancy Calculator

Due date from last menstrual period (280-day rule).

Pregnancy Conception

Conception estimate from due date, LMP with cycle, or ultrasound GA.

Pregnancy Weight Gain

Recommended gain ranges by pre-pregnancy BMI.

Calories Burned Calculator

Estimate calories burned during activities by duration or distance.

One Rep Max Calculator

Estimate maximum weight for one repetition from reps and weight.

Target Heart Rate

Target heart rate zones for exercise intensity based on age and resting HR.

Ideal Weight Calculator

Estimate ideal weight using BMI and clinical formulas plus frame size and current weight comparison.

Pace Calculator

Calculate run pace, speed, and finish time for different distances in kilometers or miles.

Due Date Calculator

The Due Date Calculator estimates the delivery date of a pregnant woman based on her last menstrual period (LMP), ultrasound, conception date, or IVF transfer date.

Scientific Calculator

Trig, logarithms, powers, roots, and standard arithmetic.

Fraction Calculator

Add, subtract, multiply, and divide; results reduced.

Percentage Calculator

Percent of value, percent change, and reverse percentage.

Random Number Generator

Generate random integers in a range with optional uniqueness.

Standard Deviation Calculator

Sample or population spread from a list of values.

Number Sequence Calculator

Arithmetic or geometric nth term and partial sum.

Exponent Calculator

Calculate powers: raise a base number to an exponent.

Binary Calculator

Binary arithmetic and conversion between binary and decimal.

Hex Calculator

Hexadecimal arithmetic and conversion between hex and decimal.

Sample Size Calculator

Minimum sample size required for a proportion or mean with target confidence level and margin of error.

Probability Calculator

Probability union, intersection, neither, and exclusive outcomes for two independent events.

Percent Error Calculator

Percent error, percent difference, and measurement accuracy for observed and expected values.

Age Calculator

Exact age in years, months, and days between two dates.

Date Calculator

Add or subtract days, weeks, or months from a date.

Concrete Calculator

Cubic yards for a rectangular slab or footing.

BTU Calculator

Rough cooling BTU from room size, insulation, and sun.

Square Footage Calculator

Area for rectangles, circles, and triangles with total square footage.

Stair Calculator

Step count, rise, run, stringer length, and stair angle estimates.

Tile Calculator

Estimate the total number of tiles needed to cover a floor, roof, wall, or surface.

Mulch Calculator

Estimate mulch needed to cover an area and calculate total mulch cost.

Gravel Calculator

Estimate gravel needed based on density and depth, and calculate cost.

Hours Calculator

Calculate total hours worked, including overtime, breaks, and pay periods for time tracking.

Time Calculator

Add or subtract time values with hours, minutes, and seconds for time arithmetic calculations.

Time Card Calculator

Calculate daily and weekly hours from time card entries, including breaks and overtime for payroll.