Every calculation, beautifully simple.
A collection of fast, private tools that run entirely in your browser. No sign-up, no tracking — nothing ever leaves your device.
- 100free tools
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- $0cost, always
- EMI Calculator Loan EMI, amortization schedule and prepayments.
- SIP Calculator What a monthly investment grows to over time.
- Compound Interest Calculator Maturity value of a one-time deposit, any compounding.
- GST / Sales Tax Calculator Add tax to a price or work back from a total.
- Loan Affordability Calculator The most you can borrow at a monthly payment you can afford.
- Simple Interest Calculator Interest and total for a fixed rate over time.
- CAGR Calculator Compound annual growth rate from a starting and ending value.
- Investment Doubling Time Calculator Years to double your money at a rate, or the rate needed to double it by a target year.
- Mortgage Calculator Monthly payment including property tax, insurance and PMI.
- Retirement Savings Calculator What regular contributions grow to by retirement.
- Debt Payoff Calculator Snowball or avalanche order to clear multiple debts.
- Savings Goal Calculator Monthly deposit needed to reach a savings target.
- Inflation Calculator What an amount from one year is worth in another.
- Break-Even Point Calculator Units or revenue needed to cover fixed and variable costs.
- Profit Margin Calculator Gross margin and markup from cost and selling price.
- Exchange Rate Calculator Convert an amount using an exchange rate you supply.
- Net Worth Calculator Total assets minus liabilities, with a full breakdown.
- Emergency Fund Calculator How many months of expenses your savings would cover.
- Credit Card Minimum Payment Calculator How long minimum payments take, versus a fixed payment.
- Rent Affordability Calculator Rent you can afford from your income, by the 30% rule.
- Freelance Hourly Rate Calculator Hourly rate to charge from a target income and billable hours.
- Property Tax Calculator Annual and monthly property tax from a home value and rate.
- Auto Loan Calculator Monthly car payment with trade-in, down payment and sales tax.
- Zakat Calculator Zakat due at 2.5% of qualifying assets above the nisab.
- Loan-to-Value (LTV) Calculator Loan-to-value ratio from a loan amount and property value.
- Percentage Calculator Find X% of a number and more.
- Tip Calculator Tip amount, total and per-person split.
- Fuel Cost Calculator What a trip costs in fuel, split any number of ways.
- Date Difference Calculator Days and weeks between two dates.
- Age Calculator Your exact age in years, months and days, plus your next birthday.
- Discount Calculator Sale price from a discount, or the original price from a sale.
- Unit Price Calculator Compare two pack sizes and see which is cheaper per unit.
- Time Duration Calculator Add or subtract two durations, normalized and signed.
- Time Zone Converter Convert a time between two time zones.
- Countdown Calculator Live countdown to any date and time.
- Group Expense Splitter Split shared costs unevenly among named people.
- Work Hours Calculator Total hours worked from clock-in and clock-out times.
- Grade Calculator Weighted final grade from assignment scores.
- Recipe Ratio Scaler Scale ingredient quantities up or down for any serving size.
- Gas Mileage Calculator Fuel economy in MPG or L/100km from odometer and fuel used.
- Paint Coverage Calculator How much paint a room needs, from its dimensions.
- Commute Cost Calculator Monthly commute cost by car versus public transit.
- Pet Age Calculator A dog or cat's age in human years.
- Party Food & Drink Planner How much food and drink to get for a party, by guest count.
- Appliance Energy Cost Calculator What running an appliance costs, from its wattage and use.
- Rent Split Calculator Split rent fairly among roommates by room size or evenly.
- Reading Pace Calculator Pages a day needed to finish a book by a target date.
- Shopping Cart Total Calculator Add up a list of items with quantities and tax.
- Days Since / Milestone Calculator Days, weeks or months since a date, and upcoming milestones.
- Random Team Generator Shuffle a list of names into random teams or a winner.
- BMI Calculator Body mass index and category, in metric or imperial.
- Calorie Calculator Daily calories (BMR and TDEE) from your stats and activity.
- Pregnancy Due Date Calculator Estimated due date and current week, from your last period.
- Body Fat Percentage Calculator Estimate body fat percentage from tape measurements, U.S. Navy method.
- Water Intake Calculator Daily water target in litres and glasses from body weight and exercise.
- Ideal Weight Calculator Reference body weight from four classic formulas, side by side.
- Macro Calculator Protein, carb and fat grams from a calorie target.
- Heart Rate Zone Calculator Training heart rate zones from your age.
- Waist-to-Hip Ratio Calculator Waist-to-hip ratio and health risk category.
- Sleep Cycle Calculator Bedtimes or wake times aligned to 90-minute cycles.
- One-Rep Max Calculator Estimated one-rep max from any weight and reps.
- Body Surface Area Calculator Estimated body surface area from height and weight.
- Blood Alcohol Content Estimator Estimated BAC from drinks, weight, sex and time.
- Standard Drink Calculator How many standard drinks a beverage contains.
- Intermittent Fasting Calculator Your eating window and next fast, from a fasting schedule.
- Ovulation Calculator Estimated fertile window from your cycle length.
- Steps to Calories Calculator Calories burned walking, from your step count and weight.
- Blood Pressure Category Checker Blood pressure category from a systolic/diastolic reading.
- Caffeine Half-Life Calculator How much caffeine is still in your system over time.
- Aspect Ratio Calculator Get width or height for a ratio like 16:9.
- Password Generator Strong random passwords in your browser.
- Number to Words Write a number out in words, for cheques and forms.
- Roman Numeral Converter Numbers to Roman numerals and back, either direction.
- Temperature Converter Celsius, Fahrenheit and Kelvin, all at once.
- Pace & Speed Converter Pace and speed for running, plus race finish times.
- CGPA to Percentage Calculator An approximate percentage from a CGPA, on any scale.
- Length Converter Millimetres to miles, and everything between, all at once.
- Weight Converter Milligrams to stone, and everything between, all at once.
- Number Base Converter Convert an integer between any two bases from 2 to 36.
- Data Storage Converter Bytes to KB, MB, GB, TB and back, binary or decimal.
- Volume Converter Millilitres to gallons, and everything between, all at once.
- Statistics Calculator Mean, median, mode and standard deviation of a list.
- Random Number Generator Random numbers in a range, unique or repeating.
- Dice Roller Roll any number and size of dice, with the total.
- Screen Resolution / PPI Calculator Pixel density from a screen size and resolution.
- Data Bandwidth Calculator Download time from a file size and connection speed.
- Paper Size Converter Dimensions for A4, Letter, Legal and other paper sizes.
- Speed, Distance & Time Calculator Solve for speed, distance or time from the other two.
- Flooring & Tile Calculator Boxes of flooring or tile needed for a room, with waste.
- Percentage Change Calculator Percent increase or decrease between two values.
- Ratio & Proportion Solver Solve the missing value in a proportion, A:B = C:?
- Fraction Calculator Add, subtract, multiply or divide fractions, simplified.
- Golden Ratio Calculator The golden-ratio proportioned length for any dimension.
- Betting Odds Converter Convert odds between fractional, decimal, American and probability.
- Pet Food Portion Calculator Daily food amount for a dog or cat by weight and activity.
- Pressure Converter PSI, bar, pascal and atmospheres, all at once.
- Energy Unit Converter Joules, calories, kWh and BTU, all at once.
- Power Unit Converter Watts, horsepower and BTU/hr, all at once.
- Angle Converter Degrees, radians and gradians, all at once.
- Concrete Calculator Concrete volume and bags needed for a slab.
Why ToolHub
A collection of small, fast calculators and generators that run entirely in your browser. No sign-up, no upload, nothing leaves the page.
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Instant
Static pages that load immediately, and 99 calculators that update as you type — no spinner, no round trip. The Password Generator keeps its Generate button on purpose, so the password never changes while you are copying it.
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Nothing is uploaded
Every calculation happens in your browser. Your input never reaches a server.
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One page per tool
Each tool is its own page, so you can bookmark or link straight to the one you need.
Frequently asked questions
Is ToolHub free?
Yes, and there is no account or sign-up at any point.
Does ToolHub upload what I type?
No. Every calculation runs in your browser using JavaScript — nothing you enter is sent to a server.
Does it work offline?
Once a page has loaded, the calculators on it keep working without a connection, since the computation happens locally. Loading a new page still needs one.