All Calculators
121 calculators across 9 categories — find exactly what you need.
Finance
Loans, investments, taxes, retirement • 69 calculators
Mortgage Calculator
Monthly payment with taxes, insurance, PMI, HOA, extra payments, and full amortization schedule.
Amortization Calculator
Full amortization schedule with extra payments, one-time lump sums, charts, and interest savings.
Auto Loan Calculator
Monthly car payment with trade-in, rebates, taxes, fees, and full amortization breakdown.
Compound Interest
Project investment growth with compounding, regular contributions, and year-by-year schedule.
Retirement Savings
4-mode retirement planner: savings projection, target nest egg, withdrawal amount, and duration.
Finance Calculator
TVM solver: compute Future Value, Present Value, Payment, Rate, or Number of Periods.
Tax Calculator
Estimate federal income tax with 2024 brackets, standard/itemized deductions, and effective rate.
House Affordability
How much home can you afford? Based on income, debt, down payment, and DTI ratios.
Investment Calculator
Project investment growth with contributions, inflation adjustment, tax impact, and year-by-year table.
Savings Calculator
Calculate final balance, required contribution, interest rate, or time to reach your savings goal.
Loan Calculator
Solve for monthly payment, loan amount, term, or interest rate with full amortization schedule.
Budget Calculator
Comprehensive personal budget planner with 35 categories, income tax, expense breakdown, and surplus/deficit.
Retirement Calculator
Retirement readiness analysis with Social Security, pension, inflation, and funding gap calculation.
401(k) Calculator
Project 401(k) balance with employer match, contribution limits, and year-by-year growth table.
Credit Card Payoff
Pay off your credit card with minimum payment, fixed payment, or payoff-by-date strategies.
Salary ↔ Hourly
Convert between salary and hourly rate with tax estimates, deductions, and all pay periods.
Inflation Calculator
See how purchasing power changes over time with 110 years of US CPI data.
Interest Rate Calculator
Find the interest rate on a loan or investment given PV, FV, payment, and term.
Rent Affordability
How much rent can you afford? Based on income, debt, and standard housing ratios.
Estate Tax Calculator
Estimate federal estate tax liability with 2024 exemptions and graduated brackets.
Social Security Calculator
Estimate monthly Social Security benefits at different claiming ages.
Annuity Payout Calculator
Calculate annuity payouts from a lump sum, or find the lump sum needed for target income.
Debt Consolidation
Compare current debt payments vs. a consolidation loan with per-debt charts and payoff schedules.
Student Loan Calculator
Monthly payments and payoff timeline for student loans with multiple repayment plans.
Simple Interest Calculator
Calculate simple interest, total amount, or solve for rate, principal, or time.
Bond Calculator
Bond price, yield to maturity, duration, and coupon payment calculator.
Roth IRA Calculator
Project Roth IRA growth with contributions, income limits, and tax-free withdrawal scenarios.
RMD Calculator
Calculate Required Minimum Distributions from IRAs and 401(k)s using IRS life expectancy tables.
Cash Back vs. Low Interest
Compare dealer cash back vs. low-interest financing — which saves more money?
Depreciation Calculator
Asset depreciation: Straight-Line, DDB, SYD, Declining Balance, or MACRS with full schedule.
Margin Calculator
Calculate gross margin, markup, revenue, or cost with visual breakdown.
Business Loan Calculator
Term, SBA, or line of credit — monthly payment, APR with fees, and amortization schedule.
Personal Loan Calculator
Monthly payment, total interest, and APR for personal loans with credit score rate presets.
Lease Calculator
Car lease monthly payment from MSRP, money factor, residual, and term.
Budget Calculator
Complete personal finance budget with 35 categories, tax, expense chart, and monthly/annual view.
IRR Calculator
Internal Rate of Return, NPV, and MIRR for up to 50 custom cash flows.
APR Calculator
True Annual Percentage Rate including all fees — compare loan offers accurately.
VA Mortgage Calculator
VA loan monthly payment with funding fee, no PMI, and veteran benefit explanation.
HELOC Calculator
Home equity line of credit — draw period, repayment period, interest, and max credit line.
Rent vs. Buy Calculator
Comprehensive rent vs. buy comparison with equity, tax benefits, investment returns, and break-even.
Present Value Calculator
PV of a lump sum or annuity with discount rate, compounding frequency, and period table.
Commission Calculator
Calculate commission amount, rate, or sale price — including tiered commission structures.
Canadian Mortgage Calculator
Canadian mortgage with semi-annual compounding, CMHC insurance, and term vs. amortization.
Percent Off Calculator
Calculate sale price, discount amount, savings percentage, or tax-inclusive final price.
Interest Calculator
Simple vs. compound interest with contributions, effective annual rate, and year-by-year table.
Mortgage Payoff Calculator
Impact of extra monthly or annual mortgage payments — interest saved and time shaved off.
Sales Tax Calculator
Before/after tax price, tax amount, or find tax rate — with all 50 US state rates.
Wedding Cost Calculator
Wedding budget planner with 16 cost categories, national average ranges, and per-guest cost.
Pension Calculator
Defined Benefit or Defined Contribution pension — monthly income, survivor benefit, and lifetime payout.
Repayment Calculator
Find your loan repayment amount or payoff time. Supports all compounding frequencies.
College Cost Calculator
Estimate future college costs with inflation, savings growth, and 529 plan tax benefits.
CD Calculator
Certificate of deposit calculator with APY/APR conversion, compounding options, and tax impact.
Mutual Fund Calculator
Project mutual fund growth with expense ratios, loads, capital gains tax, and annual fee drag.
IRA Calculator
Traditional vs Roth IRA comparison with tax deductions, tax-free growth, and 4% rule income.
VAT Calculator
Add or remove VAT from prices. Supports 20+ country presets, all major currencies, and three solve modes.
Auto Lease Calculator
Full lease payment breakdown: money factor, residual value, depreciation, and equivalent APR.
Average Return Calculator
Calculate arithmetic mean, CAGR, standard deviation, and year-by-year portfolio growth.
Discount Calculator
Three solve modes: find sale price, find discount %, or find original price.
Debt Ratio Calculator
Calculate front-end and back-end DTI, debt-to-asset ratio, and net worth.
Take-Home Pay Calculator
US paycheck with 2024 federal brackets, FICA, state taxes, filing status, and deductions.
Boat Loan Calculator
Boat financing with sales tax, title fees, trade-in, and total cost of ownership.
Refinance Calculator
Compare current vs refinanced loan side-by-side with break-even point and cash-out options.
Rental Property Calculator
Full rental property analysis: cash flow, NOI, cap rate, cash-on-cash return, and projections.
ROI Calculator
Return on investment with annualized ROI, NPV, benefit-cost ratio, and multi-investment compare.
FHA Loan Calculator
FHA mortgage with upfront and annual MIP, 3.5% down payment, and full monthly breakdown.
Home Equity Loan Calculator
Home equity loan vs HELOC comparison with available equity, LTV, and monthly payment.
Down Payment Calculator
Plan your home down payment with savings projections, time to goal, and PMI savings.
Payback Period Calculator
Simple and discounted payback period with cash flows, profitability index, and NPV.
Mortgage Calculator UK
UK mortgage with pound sterling, deposit, repayment vs interest-only, and SDLT stamp duty.
Health
BMI, nutrition, pregnancy, body composition • 27 calculators
BMI Calculator
Body Mass Index with WHO classification, healthy weight range, BMI Prime, and visual gauge.
BMI Calculator (Full)
Extended BMI with anorexic/overweight indicators, body fat estimate, BMI Prime, ponderal index.
Calorie Calculator
TDEE and daily calorie target with macro breakdown, activity levels, and weight-loss timeline.
Pregnancy Calculator
Pregnancy info from due date, last period, conception, ultrasound, or IVF with trimester milestones.
Pregnancy Conception Calculator
Estimate due date, conception window, and milestones from LMP, conception date, or due date.
Due Date Calculator
Estimate your due date from last period, conception, ultrasound, or IVF transfer date.
Ovulation Calculator
Predict fertile windows and ovulation days for the next 3 cycles.
Period Calculator
Track upcoming periods, fertile windows, and ovulation days for 6 cycles ahead.
Pregnancy Weight Gain
IOM-guideline based weight gain tracker for pregnancy with BMI classification.
Ideal Body Weight
Estimate ideal body weight using Hamwi, Devine, Miller, and Robinson clinical formulas.
Macro Calculator
Personalized protein, carb, and fat targets based on your goals and activity level.
One-Rep Max (1RM)
Estimate your maximum lift using 7 formulas including Epley, Brzycki, and Lander.
Target Heart Rate
Find your cardio training zones using Karvonen, Haskell, or Tanaka formula.
Blood Alcohol Content
Estimate BAC using Widmark formula with multiple drink types and BAC timeline.
Body Fat Calculator
Calculate body fat % using US Navy, BMI, or Jackson/Pollock skinfold methods.
BMR Calculator
Basal Metabolic Rate using Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle formulas.
TDEE Calculator
Total Daily Energy Expenditure with all activity levels, all BMR formulas, and goal-based calorie table.
Healthy Weight Calculator
Healthy weight range using Hamwi, Devine, Miller, Robinson formulas and BMI range.
Lean Body Mass Calculator
LBM using Boer, James, Hume, and BF%-based formulas in US and metric units.
Army Body Fat Calculator
US Army body fat measurement method with pass/fail by age group and sex.
Carbohydrate Calculator
Daily carb intake recommendation based on calories, goal, and activity level.
Protein Calculator
Daily protein intake recommendation with range by goal: maintain, lose, build muscle, athlete.
Fat Intake Calculator
Daily fat intake range (20–35% of calories) with saturated fat max and goal-based targets.
Body Type Calculator
Identify your body shape (Hourglass, Pear, Apple, Rectangle, Inverted Triangle) with style tips.
Weight Watchers Points Calculator
Calculate SmartPoints, PointsPlus, and Original Points budget and food points.
GFR Calculator
Estimated GFR (eGFR) using CKD-EPI, MDRD, and Cockcroft-Gault formulas with CKD staging.
Body Surface Area Calculator
BSA using Du Bois, Mosteller, Haycock, Gehan, Boyd, and Fujimoto formulas.
Fitness
Running, workouts, calories burned • 2 calculators
Math
Geometry, conversions, fractions • 6 calculators
Volume Calculator
Calculate volume of 12 shapes: boxes, cylinders, spheres, cones, tori, capsules, and more.
Unit Converter
Convert length, area, volume, weight, temperature, speed, time, data, energy, and pressure.
Fraction Calculator
Add, subtract, multiply, divide fractions with step-by-step solutions. Simplify and compare.
Binary Calculator
Binary, octal, decimal, and hex arithmetic plus bitwise AND, OR, XOR, NOT operations.
Matrix Calculator
Matrix add, subtract, multiply, scalar multiply, transpose, determinant, inverse, and trace.
Random Number Generator
Generate random integers, decimals, unique numbers, or shuffled sequences.
Stats
Mean, deviation, z-score, sampling • 4 calculators
Standard Deviation
Population and sample standard deviation with variance, quartiles, IQR, and frequency table.
Mean / Median / Mode
Complete descriptive statistics: mean, median, mode, range, quartiles, IQR, and more.
Z-Score Calculator
Convert raw scores to z-scores, find probabilities from z-scores, or find critical z-scores.
Sample Size Calculator
Required sample size for proportions, means, or A/B test power analysis.
Education
GPA, grades, academic tools • 2 calculators
Lifestyle
Age, time, travel, everyday tools • 5 calculators
Age Calculator
Calculate exact age in years, months, days, hours, and minutes. Includes next birthday, zodiac signs, and Chinese zodiac.
Time Calculator
Add or subtract time, calculate duration between dates, or find time difference. Converts to any time unit.
Bra Size Calculator
Calculate bra size in US, UK, EU, and Australian standards with sister size chart.
Fuel Cost Calculator
Calculate trip fuel cost by distance, fuel efficiency (mpg or L/100km), and gas price. Split by passengers.
Dice Roller
Roll any combination of dice: d4, d6, d8, d10, d12, d20, d100. With modifiers, history, and stats.
Utility
Construction, networking, security • 3 calculators
Concrete Calculator
Concrete volume for slabs, columns, footings, and stairs with bag count and cost estimate.
IP Subnet Calculator
IPv4 subnetting with CIDR notation, binary breakdown, host range, and subnet table.
Password Generator
Cryptographically strong passwords with entropy meter, custom character sets, and bulk generation.
Gig Economy
Rideshare, delivery, freelance earnings • 3 calculators
Uber Hourly Rate Calculator
Real hourly income as an Uber driver after fuel, IRS wear & tear, downtime, and bonuses.
Lyft Hourly Rate Calculator
Real hourly income as a Lyft driver after fuel, IRS wear & tear, downtime, and bonuses.
Amazon Flex Hourly Rate Calculator
True hourly income as an Amazon Flex driver after fuel, IRS wear & tear, unpaid time, tolls, and block pay.