All SFCALTOOL Calculators
Search the full collection of free browser-based tools.
Percentage Calculator
Calculate percentages, percentage increase and decrease, and find what percent one number is of another.
Fraction Calculator
Add, subtract, multiply and divide fractions with simplified results.
Average Calculator
Find the mean, median and range of a list of numbers in seconds.
Ratio Calculator
Solve ratios, simplify them, and find a missing value from a proportional relationship.
Proportion Calculator
Solve proportions and cross-multiplication problems quickly with a clear step-by-step result.
Exponent Calculator
Calculate powers, roots and exponential values for common math problems.
Square Root Calculator
Calculate square roots and verify perfect-square results instantly.
GCF LCM Calculator
Find the greatest common factor and least common multiple of two whole numbers.
Random Number Generator
Generate one or many random integers inside a range for games, testing and everyday choices.
Scientific Calculator
A browser-based scientific calculator for arithmetic, powers, roots, trigonometry and logarithms.
Loan Calculator
Estimate monthly payment, total interest and total repayment for a fixed-rate loan.
Mortgage Calculator
Estimate mortgage payments from home price, down payment, interest rate and loan term.
Compound Interest Calculator
See how savings can grow with compound interest, recurring contributions and time.
Simple Interest Calculator
Calculate simple interest and the final amount for a principal, rate and time period.
Savings Calculator
Estimate future savings from an initial balance, monthly deposits and interest rate.
Tip Calculator
Split a restaurant bill, calculate a tip percentage and see the amount per person.
Discount Calculator
Find the sale price, savings and final cost after a discount.
Sales Tax Calculator
Calculate tax amount and final price from a purchase total and tax rate.
Profit Margin Calculator
Calculate gross profit and profit margin from revenue and costs.
ROI Calculator
Measure return on investment as a percentage and calculate net gain from cost and return.
BMI Calculator
Calculate body mass index from height and weight and view a standard adult BMI category.
Calorie Calculator
Estimate daily calorie needs using age, sex, height, weight and activity level.
Body Fat Calculator
Estimate body fat percentage with a simple circumference-based method for adults.
BMR Calculator
Estimate basal metabolic rate, the approximate energy your body uses at rest.
Ideal Weight Calculator
Compare several common height-based ideal-weight formulas for adults.
Pace Calculator
Calculate running pace, speed or finish time from distance and duration.
One Rep Max Calculator
Estimate your one-repetition maximum from a submaximal lift and reps performed.
Water Intake Calculator
Get a general daily water-intake estimate based on body weight and activity.
Age Calculator
Calculate exact age in years, months and days from a birth date to any date.
Date Difference Calculator
Find the exact difference between two dates in days, weeks, months and years.
Time Calculator
Add or subtract hours, minutes and seconds without doing the math by hand.
Countdown Calculator
See how much time remains until a chosen date and time.
Business Days Calculator
Count weekdays between two dates, excluding weekends.
Weeks Between Dates Calculator
Calculate how many complete and fractional weeks separate two dates.
Time Zone Converter
Convert a date and time between common global time zones in your browser.
Unix Timestamp Converter
Convert Unix timestamps to readable dates and convert dates back to Unix time.
Length Converter
Convert common length units including mm, cm, m, km, inches, feet, yards and miles.
Weight Converter
Convert kilograms, grams, pounds, ounces, stones and tonnes instantly.
Temperature Converter
Convert Celsius, Fahrenheit and Kelvin with accurate formulas.
Area Converter
Convert square meters, square feet, acres, hectares and other area units.
Volume Converter
Convert liters, milliliters, gallons, cups, cubic meters and more.
Speed Converter
Convert km/h, mph, m/s and knots for travel, sports and engineering.
Data Storage Converter
Convert bytes, KB, MB, GB and TB using common binary or decimal units.
Energy Converter
Convert joules, calories, kilocalories, watt-hours and kilowatt-hours.
Fuel Cost Calculator
Estimate trip fuel cost from distance, fuel economy and fuel price.
Electricity Cost Calculator
Estimate appliance electricity cost from power, usage time and electricity rate.
Cooking Converter
Convert common cooking measurements such as cups, tablespoons, teaspoons and milliliters.
Split Bill Calculator
Split a shared bill evenly and include an optional tip percentage.
Date Add Subtract Calculator
Add or subtract days, weeks or months from any date to find a future or past date.
Percentage Change Calculator
Calculate percentage increase or decrease between an original and a new value.
Break Even Calculator
Find the sales volume needed to cover fixed and variable costs.
Markup Calculator
Calculate selling price, markup amount and markup percentage from cost and target markup.
Unit Price Calculator
Compare products by cost per unit, weight or volume to find the better value.
Password Generator
Generate strong random passwords with configurable length and character sets.
Data Transfer Time Calculator
Estimate download or upload time from file size and connection speed.
Image Aspect Ratio Calculator
Calculate image aspect ratio and missing width or height from known dimensions.
Pixels To Inches Calculator
Convert pixels to physical inches using a selected DPI value.
Hex To Decimal Calculator
Convert hexadecimal numbers to decimal and decimal values to hexadecimal.
Binary Calculator
Convert binary and decimal values and perform basic binary arithmetic.
Base64 Encoder Decoder
Encode text to Base64 or decode Base64 back into readable text in your browser.
Color Converter
Convert common HEX, RGB and HSL color formats for web and design work.
JSON Formatter
Format and validate JSON with readable indentation and clear error messages.
URL Slug Generator
Turn a title into a clean SEO-friendly URL slug using lowercase words and hyphens.
Word Character Counter
Count words, characters, sentences and reading time for any text.
Date To Days Calculator
Convert a date to its day-of-year number and count remaining days in the year.
Hours To Minutes Calculator
Convert hours and fractional hours into minutes and seconds.
Minutes To Hours Calculator
Convert minutes into hours and remaining minutes for quick time planning.
Days Between Dates Calculator
Count the number of calendar days between two dates.
Fraction To Decimal Calculator
Convert a fraction to decimal form and simplify the fraction first.
Decimal To Fraction Calculator
Convert a decimal into a simplified fraction.
Cube Calculator
Calculate the volume and surface area of a cube from its side length.
Cylinder Volume Calculator
Calculate cylinder volume and surface area from radius and height.