Over 214 accurate, instant calculators — financial, tax, real estate, Singapore-specific, and business tools. No app, no account required.
Calculate Body Mass Index with WHO categories, healthy weight range, and BMI scale.
Daily calorie needs for weight loss, maintenance, or muscle gain using Mifflin-St Jeor.
Basal Metabolic Rate using Mifflin-St Jeor and Harris-Benedict formulas.
Total Daily Energy Expenditure across all activity levels.
Body fat percentage using the US Navy circumference method.
Ideal body weight across Devine, Robinson, Miller & Hamwi formulas.
Heart rate training zones using the Karvonen reserve method.
Daily hydration target based on weight, activity level, and climate.
Check your blood pressure against AHA/ACC 2017 clinical guidelines.
Estimate blood alcohol content using the Widmark formula — never drink and drive.
Estimate your 1RM with Brzycki, Epley, Lander & O'Conner formulas + training chart.
Running pace, finish time, or distance calculator for any race distance.
WHR health risk assessment per WHO cardiovascular risk guidelines.
LBM using Boer, James & body fat % methods — includes Fat-Free Mass Index.
BMI with WHO Asian cut-off thresholds for populations with higher metabolic risk.
Predict your ovulation date and fertile window with a 3-cycle forecast.
Predict your next period and track your cycle over the next 6 months.
Estimate baby due date from LMP, conception date, ultrasound, or IVF transfer.
Calculate monthly payments, total interest, and amortization for any home loan.
Compute loan payments, total interest, and full amortization table.
Car payment estimator with down payment, trade-in value, and taxes.
Calculate simple and compound interest for any principal and rate.
See how money grows with compounding over time with chart.
Compute interest on a principal using flat simple interest formula.
Monthly payment estimator for loans with flexible inputs.
Generate full monthly amortization schedule with principal vs interest splits.
All-in-one TVM: PV, FV, rate, and payment.
Calculate the real Annual Percentage Rate including all fees and points.
Project savings growth with monthly contributions and compound interest.
Forecast portfolio growth with contributions, rate, and time horizon.
Certificate of Deposit interest calculator with maturity payout.
Calculate bond price, yield to maturity, and coupon payments.
Estimate mutual fund returns with expense ratio and NAV growth.
Project Roth IRA growth with annual contributions and employer match.
Traditional IRA calculator with pre-tax growth and RMD projections.
401(k) balance forecaster with employer match and vesting schedule.
Required Minimum Distribution calculator per IRS life expectancy tables.
Find the implied interest rate from payment and principal.
Compute geometric and arithmetic average investment returns.
Discount future cash flows to today's present value.
Project the future value of today's investment.
Plan your retirement nest egg with savings rate and draw-down projection.
Financial Independence Retire Early: find your FIRE number and date.
How much can you safely withdraw? Based on the 4% rule and historical data.
Estimate defined benefit pension payouts based on years of service and salary.
Estimate Social Security benefits at different retirement ages.
Calculate future value of an annuity with regular payments.
Determine monthly payout from a lump sum over a set period.
Project 401(k) balance with employer match and rate of return.
Estimate US federal income tax liability with deductions and credits.
Add or remove sales tax from any price for any US state.
Add or extract VAT at any rate — useful for UK, EU, and Singapore GST.
Compute the marriage tax penalty or bonus for joint filing.
Estimate federal estate tax liability with exemption thresholds.
Convert salary between hourly, daily, weekly, monthly, and annual.
Net paycheck after federal, state, Social Security, and Medicare deductions.
Find out how long to pay off your card and total interest cost.
Multi-card debt payoff using avalanche or snowball method.
Plan your debt payoff with target date or minimum payment strategies.
Compare consolidated loan vs current debts — see total savings.
Loan repayment schedule with early payment and extra contribution options.
Student loan payoff with IDR plan comparison and forgiveness estimation.
Monthly payment and total interest for unsecured personal loans.
Commercial loan payment calculator with balloon payment option.
Compare cash-back vs low-APR auto financing offers.
Calculate your DTI ratio for mortgage and loan qualification.
How much house can you afford based on income and debts?
Extra payment impact on your mortgage — save years and thousands.
How much rent can you afford? Based on income multiplier rules.
Calculate required down payment and PMI implications.
Comprehensive rent vs buy comparison with opportunity cost.
Cap rate, cash-on-cash return, and NOI for rental properties.
All-in-one real estate ROI with closing costs and appreciation.
Break-even analysis and lifetime savings from mortgage refinancing.
FHA loan payments with MIP (mortgage insurance premium).
VA loan payments with funding fee and no PMI computation.
Home equity loan payment and available equity estimator.
Home Equity Line of Credit payment during draw and repayment periods.
UK mortgage calculator with stamp duty and LTV ratios.
Canadian mortgage with CMHC insurance and compounding rules.
Full month-by-month mortgage amortization table.
Marine loan payment calculator with seasonal payment options.
Monthly lease payment with residual value and money factor.
Car lease monthly payment with money factor and capitalized cost.
Car loan payment with trade-in, taxes, and GAP insurance.
Track assets vs liabilities — your complete financial snapshot.
Extended IRR for irregular investment cash flows — just like Excel XIRR.
Compound Annual Growth Rate calculator for any investment period.
How much emergency fund do you need? Target 3-6 months expenses.
How long to double your money at any interest rate.
Real rate of return after adjusting for inflation using Fisher equation.
Optimal stocks/bonds split by age, risk tolerance, and goals.
See the opportunity cost of daily micro-spending habits over decades.
How much you lose by delaying investments — time in market wins.
Internal Rate of Return for equal-interval cash flow series.
Net Present Value of investment cash flows at your discount rate.
Time to recover initial investment from cash flows.
Return on Investment percentage for any financial decision.
Price after percentage discount — or find the original price.
Final price after X% off, with savings amount.
Internal Rate of Return for periodic project cash flows.
Estimate monthly CPF Life payouts at 65 based on RA balance and contributions.
Additional Buyer's Stamp Duty for Singapore property purchases.
Seller's Stamp Duty for Singapore property sold within holding period.
Tax savings from Singapore Supplementary Retirement Scheme contributions.
Total Debt Servicing Ratio — Singapore MAS 55% limit check.
Mortgage Servicing Ratio for HDB/EC loans — 30% rule check.
Singapore YA2024 personal income tax with full relief calculations.
Life & critical illness insurance gap — how much cover do you actually need?
Units and revenue needed to cover fixed and variable costs.
EBITDA multiple, revenue multiple, DCF, and book value methods.
Startup runway, gross and net burn rate, and break-even month.
CAC, LTV:CAC ratio, and payback period for unit economics.
Customer Lifetime Value using simple, subscription, or DCF method.
Net Present Value for project investment decisions.
Gross, operating, and net profit margin from revenue and costs.
Inventory ratio, DSI, holding costs, and industry benchmark.
Straight-line, declining balance, and MACRS depreciation schedules.
Profit margin, markup, and gross profit from cost and revenue.
Calculate sales commission, tiered rates, and bonus thresholds.
Monthly budget planner with income, expenses, and savings goals.
4-year college cost projection with tuition inflation and savings.
Purchasing power calculator — what was $100 worth in 1990?
Currency conversion with real exchange rate info.
How much home can you afford based on your income?
Your exact age in years, months, days, hours, and minutes.
Sort numbers ascending or descending with sum, min, max & average.
Convert Unix timestamps to readable dates and back.
Greatest Common Factor and Least Common Multiple for multiple numbers — with prime factorization.
Complete prime factorization, all factors, divisor count, and primality check.
All factors, factor pairs, prime factorization, and perfect/abundant/deficient classification.
Shared factors of 2–4 numbers with GCF, LCM, and co-prime check.
Convert between decimal, binary, hexadecimal, and octal — with bitwise operations.
Detect arithmetic, geometric, Fibonacci, square, triangular patterns — generate next N terms.
Exact arithmetic on integers of any size (millions of digits) using BigInt — factorial, GCF, power.
Fast everyday calculator with keyboard input, history log, memory, and percentage shortcuts.
Full scientific calculator — trig, log, ln, powers, factorial, inverse functions, degree/radian.
Find percentages of numbers, percentage changes, and "X is what % of Y" — three modes.
Add, subtract, multiply, and divide fractions — with full simplification and step-by-step working.
Simplify, compare, and scale ratios — with proportion solving and unit-rate calculation.
Calculate measurement accuracy — percent error, relative error, and absolute deviation.
Round to decimal places, significant figures, or a custom multiple — 6 rounding methods.
Calculate any base raised to any power — including fractional, negative, and scientific notation exponents.
Find square roots, cube roots, and nth roots — with full decimal and radical form output.
Calculate common log (base 10), natural log (ln), and logarithms in any base.
Convert to/from scientific notation and perform arithmetic in a × 10ⁿ format.
Solve ax² + bx + c = 0 — real and complex roots with discriminant and vertex form.
Step-by-step long division with quotient, remainder, decimal result, and worked example.
Generate random integers, decimals, unique sets, lottery picks, or dice rolls.
Calculate area of 11 shapes — circle, rectangle, triangle, trapezoid, ellipse, sector, and more.
Volume of 10 3D shapes — sphere, cube, cylinder, cone, pyramid, and more.
Total and lateral surface area of 9 3D shapes — sphere, cube, cylinder, cone, pyramid, torus.
Solve any circle property from one known value: radius, diameter, circumference, or area.
Solve any triangle (SSS/SAS/AAS/ASA) — sides, angles, area, and perimeter.
Solve any right triangle from 2 known values — sides or angles — with SOH-CAH-TOA working.
Find any side of a right triangle using the Pythagorean theorem a² + b² = c².
Calculate slope, y-intercept, angle, and linear equation from two coordinate points.
Euclidean and Manhattan distance between two points in 2D or 3D space.
Calculate mean, median, mode, range, midrange, variance, and standard deviation.
Population and sample standard deviation, variance, CV, and standard error with deviation table.
Calculate P(n,r) permutations and C(n,r) combinations with factorial working.
Basic, complement, union, intersection, conditional, and Bayes theorem probabilities.
Convert raw scores to z-scores (or back) and find percentile from the normal distribution.
Minimum sample size for surveys and experiments — for proportions and means.
Calculate date differences, add or subtract days, and find workdays between dates.
Calculate time differences, add/subtract hours and minutes, and convert time units.
Calculate total work hours with break deductions and optional pay calculation.
Find duration between two times or add/subtract time from a starting point.
Count days until a future event or days since a past date, with week/month breakdown.
Find what day of the week any date falls on — with week number, leap year, and quarter.
Calculate exact age in years, months, and days from a birthdate.
Find the best bedtime or wake time based on 90-minute sleep cycles.
Calculate tip amount, total bill, and split equally among any number of people.
Roll D4–D100 and custom dice with history log, modifier support, and keyboard shortcut.
Universal unit converter for 11 categories with all-unit comparison table.
Convert shoe sizes between US, UK, EU, CM for Men's, Women's, and Kids.
Calculate GPA on 4.0 or 5.0 scale with multiple courses and cumulative GPA.
Weighted grade average and minimum final exam score needed to achieve a target grade.
Convert between cm and feet/inches and predict child height from parents.
Weight unit conversion plus fun planetary weight comparison.
Solve for speed, distance, or time with multi-unit support.
Mass unit conversion and density × volume calculation modes.
Solve for density, mass, or volume with a material reference table.
Bidirectional Arabic ↔ Roman numeral conversion with validation.
Calculate GDP using C+I+G+NX, growth rate, or per capita analysis.
Solve for voltage, current, resistance, or power from any two known values.
Calculate wire voltage drop using AWG tables with NEC compliance check.
Estimate electricity cost for multiple appliances with daily/monthly/annual breakdown.
4/5-band resistor color code decoder with series/parallel combination calculator.
Calculate download time for any file size and convert between Mbps, Gbps, MB/s units.
IPv4 subnetting with CIDR notation, host ranges, and network details.
Estimate concrete volume and bag counts for slabs, footings, columns, and stairs.
Calculate area for multiple shapes and estimate material costs.
Calculate roofing squares, bundles needed, and material cost from pitch and dimensions.
Tiles needed for any floor or wall area with waste factor and cost estimate.
Calculate mulch/topsoil volume in cubic yards, cubic feet, and bags.
Gravel/stone volume in tons, cubic yards, and cubic metres for any shape.
Calculate steps, rise, run, and stringer length with IRC code compliance check.
Estimate heating/cooling BTU needs and convert between energy units.
Calculate HP from torque & RPM, estimate from 1/4-mile ET, and convert power units.
Calculate trip fuel cost with multi-unit support and annual projection.
Calculate MPG and trip cost estimation from distance and fuel used.
Tire diameter, sidewall, circumference, and two-tire comparison with speedometer error.
Calculate World Handicap System (WHS) golf handicap from up to 20 rounds.
Calculate compatibility percentage between two names — just for fun!
Calculate wind chill and heat index using NWS formulas with frost risk and danger levels.
Calculate dew point, relative humidity, and wet-bulb temperature using the Magnus formula.
Weekly time card with daily clock-in/out, break deduction, overtime, and payroll.