ABOS TOOLSABOS Digital ↗
ABOS Digital · Tools

Fast, free tools that just work.

A growing library of single-purpose calculators, converters and generators — no sign-up, no clutter, instant answers.

Calculators
Dog Age in Human Years Calculator
Convert your dog's age to human years in seconds — adjusted for breed size. Free, instant, no sign-up.
6,200/mo
Semi Truck Fuel Cost Calculator
Estimate the fuel cost of a truck trip by distance, mpg and fuel price. Free, instant.
700/mo
Weighted GPA Calculator
Calculate your GPA from total grade points and credit hours. Free, instant, no sign-up.
3,300/mo
Golf Handicap Calculator
Calculate your score differential from a round using course rating and slope. Free tool.
1,900/mo
Shooting Percentage Calculator
Calculate shooting percentage from makes and attempts. Free for any sport.
800/mo
Fishing Line Strength Calculator
Get a recommended line pound-test for your target fish weight. Free, instant guide.
600/mo
Percentage Calculator
Work out what one number is as a percentage of another, or a percentage of a value. Free, instant.
600,000/mo
Tip Calculator
Work out the tip and split a bill between any number of people. Free, instant, no sign-up.
90,000/mo
Age Calculator
Work out your exact age in years, months and days from your date of birth. Free, instant.
300,000/mo
Date Difference Calculator
Work out the number of days, weeks and months between two dates. Free, instant, no sign-up.
40,000/mo
Discount Calculator
Work out the sale price and how much you save from an original price and a percentage off. Free.
40,000/mo
Fuel Cost Calculator
Estimate the fuel cost of a journey from distance, mpg and fuel price. UK gallons, free, instant.
40,000/mo
Unit Price Calculator
Compare two products by price per unit to see which is better value. Free, instant, no sign-up.
18,000/mo
Sleep Calculator
Find the best times to go to bed to wake up refreshed, based on 90-minute sleep cycles. Free.
90,000/mo
Countdown Calculator
Count how many days until (or since) a chosen date. Free, instant, no sign-up.
18,000/mo
Converters
Cups to Grams Converter (Baking)
Convert cups to grams for flour, sugar, butter and more. Ingredient-accurate baking conversions, instantly.
3,400/mo
Amps to Kilowatts Calculator
Convert amps to kilowatts for DC, single-phase and three-phase AC. Free electrical power calculator.
2,400/mo
Kelvin to Fahrenheit Converter
Convert Kelvin to Fahrenheit instantly with the exact formula. Free, no sign-up.
1,600/mo
Hectares to Acres Converter
Convert hectares to acres instantly. Accurate land-area conversion, free and no sign-up.
2,800/mo
Knots to Miles per Hour Converter
Convert knots to miles per hour instantly. Free speed converter, no sign-up.
1,900/mo
Feet per Second to MPH Converter
Convert feet per second (ft/s) to miles per hour instantly. Free, no sign-up.
900/mo
Troy Ounce to Grams Converter
Convert troy ounces to grams instantly — the standard for precious metals. Free, no sign-up.
2,300/mo
Newton-Metres to Foot-Pounds Converter
Convert Nm to ft-lb torque instantly. Free torque converter, no sign-up.
1,400/mo
Inches of Water (inH₂O) to PSI Converter
Convert inches of water column to psi instantly. Free pressure converter for HVAC and gas.
850/mo
Pounds per Square Foot to PSI Converter
Convert psf to psi instantly. Free pressure/load converter, no sign-up.
800/mo
Percent Slope to Degrees Converter
Convert a percentage grade to degrees instantly. Free slope converter, no sign-up.
1,100/mo
BTU/hr to Watts Converter
Convert BTU per hour to watts instantly. Free power converter for heating and cooling.
1,200/mo
PPM to mg/L Converter
Convert ppm to mg/L for dilute water solutions instantly. Free, no sign-up.
1,200/mo
CC to HP Converter (Engine)
Estimate engine horsepower from cc (engine displacement). Free rough-guide converter.
700/mo
RPM to MPH Converter
Convert wheel RPM to mph using tyre diameter. Free speed converter, no sign-up.
1,100/mo
mg to mL Converter (by Concentration)
Convert milligrams to millilitres using the solution concentration. Free dosage helper.
2,100/mo
Millimoles (mmol) to Milligrams Converter
Convert mmol to mg using the molar mass. Free chemistry converter, no sign-up.
600/mo
Centimetres to Inches Converter
Convert centimetres to inches instantly and accurately. Free, no sign-up.
250,000/mo
Inches to Centimetres Converter
Convert inches to centimetres instantly and accurately. Free, no sign-up.
200,000/mo
Kilograms to Pounds Converter
Convert kilograms to pounds instantly and accurately. Free, no sign-up.
300,000/mo
Pounds to Kilograms Converter
Convert pounds to kilograms instantly and accurately. Free, no sign-up.
250,000/mo
Miles to Kilometres Converter
Convert miles to kilometres instantly and accurately. Free, no sign-up.
200,000/mo
Kilometres to Miles Converter
Convert kilometres to miles instantly and accurately. Free, no sign-up.
200,000/mo
Celsius to Fahrenheit Converter
Convert celsius to fahrenheit instantly and accurately. Free, no sign-up.
200,000/mo
Fahrenheit to Celsius Converter
Convert fahrenheit to celsius instantly and accurately. Free, no sign-up.
200,000/mo
Litres to Gallons (UK) Converter
Convert litres to gallons (uk) instantly and accurately. Free, no sign-up.
40,000/mo
Gallons (UK) to Litres Converter
Convert gallons (uk) to litres instantly and accurately. Free, no sign-up.
40,000/mo
Feet to Metres Converter
Convert feet to metres instantly and accurately. Free, no sign-up.
90,000/mo
Metres to Feet Converter
Convert metres to feet instantly and accurately. Free, no sign-up.
90,000/mo
Grams to Ounces Converter
Convert grams to ounces instantly and accurately. Free, no sign-up.
60,000/mo
Ounces to Grams Converter
Convert ounces to grams instantly and accurately. Free, no sign-up.
60,000/mo
Stones to Kilograms Converter
Convert stones to kilograms instantly and accurately. Free, no sign-up.
40,000/mo
Kilograms to Stones Converter
Convert kilograms to stones instantly and accurately. Free, no sign-up.
40,000/mo
MPH to KM/H Converter
Convert mph to km/h instantly and accurately. Free, no sign-up.
60,000/mo
KM/H to MPH Converter
Convert km/h to mph instantly and accurately. Free, no sign-up.
60,000/mo
Square Metres to Square Feet Converter
Convert square metres to square feet instantly and accurately. Free, no sign-up.
33,000/mo
Square Feet to Square Metres Converter
Convert square feet to square metres instantly and accurately. Free, no sign-up.
33,000/mo
Generators
Wedding Hashtag Generator
Generate unique, catchy wedding hashtags from the couple's names — free, instant, no sign-up.
5,200/mo
Gaming Username Generator
Generate cool, unique gamer usernames from any word or name. Free, instant, no sign-up.
3,600/mo
Text to NATO Phonetic Alphabet Converter
Convert any text into the NATO phonetic alphabet (Alpha, Bravo, Charlie…). Free, instant.
1,100/mo
Email Subject Line Generator
Generate high-open-rate email subject lines from your topic. Free, instant, no sign-up.
2,900/mo
Product Description Generator
Generate a persuasive product description from a name and key benefit. Free, instant.
1,800/mo
Random Team Name Generator
Generate funny, catchy team names for sports, trivia and work. Free, instant, no sign-up.
4,100/mo
Wi-Fi Password Generator
Generate strong, pronounceable Wi-Fi passwords that are easy to share. Free, instant.
1,300/mo
Fake US Address Generator
Generate realistic fake US addresses for testing forms and apps. Free, instant.
3,800/mo
Invoice Number Generator
Generate clean, sequential invoice numbers with your own prefix. Free, instant.
900/mo
Color Palette Generator
Generate beautiful, harmonious color palettes with hex codes. Free, instant, no sign-up.
2,600/mo
Icebreaker Question Generator
Get fun, random icebreaker questions for meetings, classes and parties. Free, instant.
1,500/mo
Blog Post Title Generator
Generate click-worthy blog titles from any keyword. Free, instant, no sign-up.
2,200/mo
Cover Letter Generator
Generate a professional cover letter from a few details. Free, instant, no sign-up.
4,400/mo
Random Bible Verse Generator
Get an uplifting random Bible verse. Free, instant, no sign-up.
2,700/mo
Acronym Generator
Turn a word or letters into a catchy acronym expansion. Free, instant, no sign-up.
3,100/mo
Random Number Generator
Generate one or more random numbers between any minimum and maximum. Free, instant, no sign-up.
90,000/mo
Finance & Money
401(k) Early Withdrawal Penalty Calculator
Estimate the tax and 10% penalty on an early 401(k) withdrawal, and what you'd actually keep.
2,400/mo
LLC Self-Employment Tax Calculator
Estimate the 15.3% self-employment tax on your LLC net profit. Free planning tool.
1,100/mo
Real Estate Cap Rate Calculator
Calculate capitalization rate from NOI and property value. Free investment tool.
2,100/mo
Debt-to-Income (DTI) Ratio Calculator
Calculate your DTI from monthly debt and gross income. Free tool lenders use.
1,700/mo
Compound Interest Calculator
See how your savings grow with compound interest and monthly contributions. Free, instant, no sign-up.
40,000/mo
Loan Repayment Calculator
Calculate monthly repayments, total cost and interest on a personal loan. Free, instant, no sign-up.
22,000/mo
VAT Calculator
Add or remove UK VAT at any rate. See the net, VAT and gross amounts instantly. Free, no sign-up.
135,000/mo
Take-Home Pay Calculator
See your net monthly and annual pay after income tax and National Insurance. UK 2025/26. Free, instant.
110,000/mo
Pension Calculator
Project your pension pot at retirement from your current savings and monthly contributions. Free, instant.
33,000/mo
Credit Card Payoff Calculator
See how long it takes to clear a credit card and the total interest at a fixed monthly payment. Free.
14,000/mo
Car Finance Calculator
Estimate monthly PCP payments from the car price, deposit, APR, term and balloon payment. Free, instant.
12,000/mo
Income Tax Calculator
Work out the income tax on any salary for the 2025/26 tax year, with a band-by-band breakdown. Free.
90,000/mo
National Insurance Calculator
Calculate the employee National Insurance due on your salary for 2025/26. Free, instant, no sign-up.
12,000/mo
Dividend Tax Calculator
Work out the tax on dividend income for 2025/26, based on your other income. Free, instant, no sign-up.
9,900/mo
Capital Gains Tax Calculator
Estimate the capital gains tax on a gain for 2025/26, based on your income. Free, instant, no sign-up.
18,000/mo
Life Insurance Calculator
Estimate how much life insurance cover you need to protect your family. Free, instant, no sign-up.
20,000/mo
Income Protection Calculator
Estimate the monthly income protection benefit you may need if you could not work. Free, no sign-up.
5,400/mo
ISA Calculator
Project the tax-free growth of a stocks or cash ISA with regular contributions. UK, free, instant.
14,000/mo
Savings Goal Calculator
Work out how much to save each month to reach a target by a set date. Free, instant, no sign-up.
6,600/mo
FIRE Calculator
Work out your financial independence (FIRE) number using the 4% rule. Free, instant, no sign-up.
8,100/mo
Emergency Fund Calculator
Work out how big your emergency fund should be and how much more you need. Free, instant.
5,400/mo
Property & Mortgages
Mortgage Repayment Calculator
Work out your monthly mortgage payment, total repaid and total interest. Free, instant, no sign-up.
60,000/mo
Mortgage Affordability Calculator
Estimate how much you could borrow for a mortgage based on your income. Free, instant, no sign-up.
18,000/mo
Rental Yield Calculator
Calculate gross and net rental yield on a buy-to-let property. Free, instant, no sign-up.
9,900/mo
Stamp Duty Calculator
Work out the stamp duty (SDLT) on a property purchase in England and Northern Ireland. Free, instant.
90,000/mo
Mortgage Overpayment Calculator
See how much interest and time you save by overpaying your mortgage each month. Free, instant.
14,000/mo
Loan-to-Value Calculator
Work out your mortgage loan-to-value ratio from the property value and loan amount. Free, instant.
9,900/mo
Buy-to-Let Stamp Duty Calculator
Work out stamp duty on a buy-to-let or second home, including the 5% surcharge. England & NI, free.
8,100/mo
Business & Work
Overtime Pay Calculator
Calculate total pay including overtime at 1.5× (or any rate). Free, instant, no sign-up.
900/mo
Break-Even Point Calculator
Find how many units you must sell to cover costs. Free break-even calculator.
1,500/mo
Employee Turnover Rate Calculator
Calculate turnover rate from separations and average headcount. Free HR tool.
1,200/mo
Redundancy Pay Calculator
Estimate your statutory redundancy pay based on age, years of service and weekly pay. UK, free, instant.
40,000/mo
Self-Employed Tax Calculator
Estimate income tax and Class 4 National Insurance on your self-employed profit. UK 2025/26, free.
18,000/mo
Corporation Tax Calculator
Estimate UK corporation tax on company profit, including marginal relief. 2025/26, free, instant.
14,000/mo
Contractor Day Rate Calculator
Work out the day rate you need to charge to hit a target annual income. Free, instant, no sign-up.
4,400/mo
Freelance Hourly Rate Calculator
Work out the hourly rate you need to charge as a freelancer to hit your income goal. Free, instant.
3,600/mo
Profit Margin Calculator
Calculate profit, margin and markup from your cost and sale price. Free, instant, no sign-up.
33,000/mo
Break-Even Calculator
Work out how many units you must sell to cover your fixed costs. Free, instant, no sign-up.
12,000/mo
Statutory Sick Pay Calculator
Estimate the statutory sick pay (SSP) due for a period off work. UK 2025/26, free, instant.
9,900/mo
Statutory Maternity Pay Calculator
Estimate your statutory maternity pay (SMP) over the 39-week period. UK 2025/26, free, instant.
18,000/mo
Holiday Entitlement Calculator
Work out your statutory holiday entitlement from the days you work per week. UK, free, instant.
22,000/mo
Home & Trades
Paint Coverage Calculator
Work out exactly how much paint you need by area and coats. Free square-feet paint calculator.
3,100/mo
Mulch Coverage Calculator
Calculate how many cubic yards and bags of mulch you need by area and depth. Free and instant.
2,200/mo
Concrete Block Calculator
Work out how many concrete blocks you need for a wall by area, plus waste. Free and instant.
1,800/mo
Roof Pitch to Degrees Calculator
Convert a roof pitch (rise-in-12) to degrees instantly. Free roofing calculator.
1,400/mo
Pool Chlorine Dosage Calculator
Work out how much liquid chlorine to add to raise your pool to target ppm. Free, instant.
800/mo
Recipe Scaling Calculator
Scale any recipe up or down by servings and get the exact multiplier. Free, instant.
1,900/mo
Fence Panel Calculator
Work out panels and posts for a fence run, allowing for gates. Free, instant.
1,000/mo
Solar Battery Bank Size Calculator
Size a battery bank from daily energy use, days of autonomy and depth of discharge. Free.
1,700/mo
HVAC Static Pressure Calculator
Add supply and return static to get total external static pressure. Free HVAC tool.
800/mo
Concrete Curing Time Calculator
Estimate how much strength concrete has gained after a given number of days. Free tool.
700/mo
Seed Germination Rate Calculator
Calculate the germination percentage from seeds planted and sprouted. Free, instant.
500/mo
Paint Calculator
Work out how many litres of paint you need for a room from its dimensions and coats. Free, instant.
40,000/mo
Tile Calculator
Work out how many tiles you need for a floor or wall, including waste. Free, instant, no sign-up.
22,000/mo
Flooring Calculator
Work out how many packs of laminate or wood flooring you need for a room. Free, instant.
18,000/mo
Concrete Calculator
Work out the volume of concrete you need and roughly how many bags. Free, instant, no sign-up.
40,000/mo
Gravel Calculator
Work out how much gravel you need in cubic metres and tonnes for a given area and depth. Free.
22,000/mo
Decking Calculator
Work out how many decking boards you need for an area, including a waste allowance. Free, instant.
9,900/mo
Turf Calculator
Work out how much turf you need in square metres and rolls for a lawn. Free, instant, no sign-up.
12,000/mo
BTU Calculator
Estimate the BTU output needed to heat a room from its dimensions and type. Free, instant.
18,000/mo
Health & Fitness
Calories Burned Mowing Lawn Calculator
Estimate calories burned push-mowing the lawn by weight and time. Free, instant.
600/mo
IV Drip Rate Calculator
Calculate IV drip rate in drops per minute from volume, time and drop factor. Free for study.
1,300/mo
Carbon Footprint per Mile Calculator
Estimate CO₂ emissions for a car trip from miles and mpg. Free, instant.
1,400/mo
Lean Body Mass Calculator (Navy Method)
Estimate lean body mass and body-fat % using the US Navy tape method. Free, instant.
1,100/mo
BMI Calculator
Calculate your Body Mass Index (BMI) from your height and weight. Free, instant, no sign-up.
450,000/mo
Calorie Calculator
Estimate your daily maintenance calories (TDEE) using the Mifflin-St Jeor formula. Free, instant.
300,000/mo
Body Fat Calculator
Estimate your body fat percentage using the US Navy method from a few measurements. Free, instant.
60,000/mo
Ideal Weight Calculator
Estimate your ideal body weight for your height using the Devine formula. Free, instant, no sign-up.
40,000/mo
Water Intake Calculator
Estimate how much water you should drink per day based on your body weight. Free, instant.
33,000/mo
Running Pace Calculator
Work out your running pace per kilometre and mile from a distance and time. Free, instant.
90,000/mo
One Rep Max Calculator
Estimate your one-rep max from a weight and reps using the Epley formula. Free, instant.
40,000/mo
Macro Calculator
Split your daily calories into protein, carbs and fat grams for your goal. Free, instant.
60,000/mo
Due Date Calculator
Estimate your pregnancy due date from the first day of your last period. Free, instant, no sign-up.
110,000/mo
Calories Burned Calculator
Estimate the calories you burn in an activity from its intensity, your weight and time. Free, instant.
40,000/mo