Fast, accurate, and mobile-friendly calculators for finance, health, math, and everyday life. No signup required.
Loan, mortgage, investment, tax, and savings calculators....
BMI, calorie, heart rate, and wellness calculators....
Percentage, algebra, geometry, and statistics tools....
Unit converters, fuel cost, GPA, and everyday tools....
Calculate your Equated Monthly Installment for any loan. Enter the pri...
Plan your Systematic Investment Plan returns. See how small monthly in...
Calculate how your money grows with compound interest. Supports differ...
Calculate simple interest on any principal without compounding....
Estimate your monthly mortgage payment including the total interest ov...
Calculate monthly payments for any personal or auto loan....
Calculate Return on Investment as a percentage....
Calculate savings and final price after a percentage discount....
Determine profit or loss and the percentage....
Estimate income tax liability based on gross income, rate, and deducti...
Find how long to reach your savings goal with monthly contributions....
Calculate down payment amount and resulting loan....
Calculate your Debt-to-Income ratio for loan eligibility....
Estimate your monthly car loan payment....
See how long to pay off a credit card and total interest....
Understand how inflation erodes purchasing power....
Estimate retirement fund growth from savings and contributions....
Convert annual salary to hourly, monthly, and bi-weekly....
Snapshot of your financial health....
Find units needed to cover all costs....
Calculate selling price from cost and markup....
Calculate profit margin percentage....
Compound Annual Growth Rate shows smoothed annual return....
Calculate present and future value of equal periodic payments....
Convert between currencies using exchange rates....
Calculate future value of a lump sum investment....
What a future sum is worth today....
Compare renting vs buying over a specific time period....
See how payments split between principal and interest....
Total return on a stock including dividends....
Estimate how long to double your investment....
Calculate dividend yield percentage....
Calculate monthly car lease payment....
Calculate bond current yield and approximate YTM....
Evaluate rental property investment yields....
Calculate sales tax and total price....
Calculate tip, total, and per-person share....
Estimate take-home pay after all deductions....
Project investment growth with lump sum + monthly contributions....
Calculate time to pay off total debt....
Calculate emergency fund target....
Calculate your Financial Independence Retire Early target number based...
Calculate monthly student loan payments and total interest cost....
Project your 401(k) balance at retirement including employer match....
Project your Roth IRA growth — all gains are tax-free in retirement....
Estimate stamp duty / transfer tax on property purchases....
Calculate cryptocurrency trading profit after exchange fees....
Calculate Dollar Cost Averaging results to see your average purchase p...
Estimate the maximum home price you can afford based on income....
Estimate capital gains tax on investment sales....
See how fund expense ratios silently eat into your returns over time....
Calculate your freelance hourly rate to match a desired salary....
Project side hustle income and tax obligations....
Calculate capitalization rate for real estate investment analysis....
Estimate your Airbnb short-term rental revenue and profit....
Estimate YouTube channel revenue from ads and sponsorships....
Calculate Amazon FBA profitability per unit including all fees....
Calculate all Etsy seller fees and net profit per sale....
Calculate eBay seller fees and profit per listing....
Calculate dropshipping profit margins per sale....
Estimate API costs for AI services like GPT, Claude, or Gemini....
Calculate SaaS metrics — MRR, ARR, projected users, and customer lifet...
Break down your wedding budget into vendor categories using standard a...
See how subscription costs add up and what you could earn investing th...
Calculate marketing cost per lead, cost per acquisition, and return on...
Quick business valuation using revenue and profit multiples....
Estimate monthly cloud hosting costs for AWS, GCP, or Azure....
Get a rough domain name value estimate based on key factors....
Calculate whether paying invoices early for a discount is worth it....
Compare a lump sum payment vs installments using present value analysi...
Calculate Body Mass Index for weight classification....
Estimate Basal Metabolic Rate — calories burned at rest....
Total Daily Energy Expenditure including activity....
Daily calorie targets for maintenance, loss, and gain....
Estimate body fat using US Navy method....
Find ideal weight range by height....
Daily water intake based on weight and activity....
Training heart rate zones using Karvonen formula....
Estimate due date from last menstrual period....
Find optimal bedtimes based on 90-min sleep cycles....
Daily macronutrient breakdown in grams....
Recommended daily protein by fitness goal....
BMI using pounds and feet/inches....
Calories burned during any activity....
Assess health risk from body fat distribution....
Estimate your one-rep max....
Body surface area for medical dosage calculations....
Estimate blood alcohol content. Never rely on this for driving decisio...
Calculate lean body mass from weight and body fat....
Recommended daily fiber intake....
Running/walking pace and speed....
Estimate cardiovascular fitness level....
Estimate time to reach goal weight....
Recommended pregnancy weight gain by week....
Estimate kidney function. Consult healthcare provider....
Keep ratio below 0.5 for better health....
Calculate fluid lost during exercise....
Classify blood pressure reading....
Calculate due date from ultrasound measurements....
Predict child's adult height....
See the financial cost of smoking....
Heart rate zones by age....
Track caffeine in your system....
Compare standing vs sitting calorie burn....
Plan your intermittent fasting schedule with eating and fasting window...
Calculate ketogenic diet macros for proper ketosis....
Convert dog age to human years accounting for breed size....
Convert cat age to human years....
Predict your next period, ovulation date, and fertile window....
Estimate baby weight percentile by age and gender. Consult pediatricia...
Interpret pulse oximeter SpO2 and heart rate readings. Always consult ...
Convert daily step count to calories, distance, and active minutes....
Predict ovulation date and fertile window for family planning....
Estimate your biological age based on lifestyle and health markers....
Understand your glasses or contact lens prescription....
Calorie needs during each pregnancy trimester....
Estimate safe sun exposure time based on your skin type and UV index....
Calculate optimal macros for lean muscle gain....
Estimate daily sodium intake from your eating habits....
Estimate post-workout recovery time based on exercise intensity and pe...
Estimate your hearing age based on highest frequency you can hear....
Calculate calories from alcoholic drinks....
Calorie needs while breastfeeding....
Track daily carbohydrate intake for diabetes management. Consult your ...
Get a personalized meditation schedule based on your experience level....
Track menopause symptom severity over time. Share results with your he...
Find protein content of popular plant-based foods....
Track postpartum recovery progress by delivery type. Always follow med...
Calculate how many eye breaks you need using the 20-20-20 rule....
Get weight-based supplement dosage guidelines. Always consult your hea...
Estimate your stress level from lifestyle factors....
Estimate gut health from dietary habits....
Calculate how many posture breaks you need during long sitting session...
Estimate daily skincare routine time....
Calculate what percentage one number is of another....
Percentage increase or decrease....
Arithmetic mean of a set of numbers....
Standard deviation and variance....
Area of common shapes....
Volume of box, cylinder, sphere....
Simplify any ratio to lowest terms....
Find the hypotenuse of a right triangle....
Solve ax²+bx+c=0....
Factorial of any number up to 170....
GCD and LCM of two numbers....
Any number to any power....
Square and cube root....
Natural, base-10, and custom base logarithms....
Trig functions in degrees....
Permutations and combinations....
2×2 matrix determinant....
Decimal to binary, octal, hex....
Simplify fractions and convert to decimal....
Circle area, circumference, diameter....
Triangle area using Heron's formula....
Slope, y-intercept, line equation, distance....
Convert to scientific notation....
Check primality and factorize....
Generate Fibonacci sequence....
All central tendency measures....
Probability and odds....
Hex color to RGB with preview....
Compound shape areas....
Weighted average calculation....
Convert between any bases....
Solve proportions....
Z-score: standard deviations from mean....
Correlation between two datasets....
Modulo operation....
Sum of a series....
GCF of multiple numbers....
Decimal to simplest fraction....
Cylinder volume and surface area....
Sphere volume and surface area....
3×3 matrix determinant....
3D dot product, magnitudes, and angle....
3D cross product vector....
Approximate definite integral of x² using Riemann sums....
Numerical derivative of x² at any point....
Add and multiply complex numbers....
Find the best-fit line for a dataset using least squares regression....
Evaluate any polynomial at a given x....
Perform set union, intersection, and difference....
Convert polar coordinates to Cartesian....
Convert Cartesian to polar coordinates....
Sum of geometric series, finite and infinite....
Sum and sequence of arithmetic series....
Find inverse function value for y=mx+b....
Calculate exact binomial probability....
Poisson probability for rare events....
Calculate normal distribution PDF and CDF at any point....
Add or subtract 2×2 matrices....
Cone volume, slant height, surface area....
Ellipse area and perimeter....
Trapezoid area....
Convert any number to Roman numerals....
Evaluate summations with common formulas....
Convert between degrees and radians....
3D distance and midpoint between two points....
Get the equation of a circle from center and radius....
Boolean algebra logic gate operations....
Find vertex, direction, and focus of a parabola....
Solve absolute value equations....
Sum of first N integers raised to a power....
Solve systems of modular equations....
Calculate exact age in years and days....
Days between two dates....
Time between two times....
Calculate GPA from letter grades....
Trip fuel cost....
All length units....
All weight units....
Temperature conversions....
Kitchen measurement conversions....
Appliance electricity cost....
Data size conversions....
Check password strength locally. Never transmitted....
Generate random numbers....
Countdown to any date....
See screen time add up....
Convert shoe sizes....
Color brightness and text contrast....
Typing speed and accuracy....
Fuel economy....
LTV ratio and PMI requirement....
Monthly carbon footprint estimate....
Named event countdown....
Download time estimate....
Paper size lookup....
Image/screen aspect ratio....
Concrete needed for a slab....
Paint needed for a room....
Mulch/soil volume....
Wallpaper rolls needed....
Carpet area and cost....
Shipping cost estimate....
Road trip time with stops....
Estimate moving boxes....
Gravel needed for landscaping....
Swimming pool volume....
Website conversion rate....
Estimate AI token count and API costs for ChatGPT, Claude, and other L...
Estimate AI image generation costs across different providers....
Calculate social media content workload across platforms....
Interpret your WiFi speed test results for common activities....
See how much time you spend on podcasts....
Estimate EV range accounting for temperature and driving conditions....
Estimate solar panel return on investment and payback period....
Calculate insulation R-value for energy efficiency....
Convert treadmill speed/incline to equivalent outdoor running pace....
Estimate taxi or rideshare fare....
Get a watering schedule based on pot size, light, and season....
Calculate laundry costs and water usage....
Calculate your total annual commute costs....
Calculate daily pet food needs and annual costs....
Find the ideal TV viewing distance....
Calculate the real value of discounted gift cards....
Scale recipe ingredients up or down....
Estimate lawn mowing time....
Estimate how long to finish a book....
Determine storage unit size from household contents....
Calculate baby formula costs....
Calculate annual daycare costs and income percentage....
Estimate rideshare costs including surge pricing....
Split utility bills fairly between roommates....
Convert clothing sizes between regions....
Check noise levels and safe exposure times....
Find the right trash bag size for your can....
Estimate drone flight time from battery and weight....
Calculate 3D printing filament usage and cost....
Calculate backpacking pack weight....
Size an air purifier for your room....
Calculate the probability of shared birthdays in a group. Surprisingly...
Calculate which tip/quote to show on which day for content rotation....
Calculate the true cost of meetings based on attendee salaries....
Convert times between time zones....
Estimate tattoo cost based on size, complexity, and artist rate....
Track your pregnancy week by week with baby size comparisons....
Estimate IVF treatment costs across multiple cycles....
Convert hourly wage to annual salary....
Calculate overtime pay including time-and-a-half....
Calculate your salary raise percentage....
Find how much rent you can afford....
Calculate net carbs for keto and low-carb diets....
Find the right stroller type for your child's size....
Project total college costs with annual inflation....
Calculate diaper costs through potty training....
Calculate pace per mile and projected race times....
Compare protein sources by cost efficiency....
Display digits of Pi. Fun for Pi Day (March 14)!...
Calculate golden ratio proportions for any value. Used in art, archite...
Calculate inflation-adjusted (real) investment returns....
Compare annual fuel costs between gas and electric vehicles....
Interpret Air Quality Index readings with health guidance....
Calculate mortgage refinance savings and break-even point....
Calculate VAT/GST inclusive or exclusive....
Calculate new rent after a percentage increase....
Calculate your accumulated sleep debt....
Calculate total supplement spending....
Count words, characters, sentences, and estimate reading time....
Validate and format JSON with error messages. Great for developers....
Generate Lorem Ipsum placeholder text for design mockups....
Generate social media hashtags from keywords....