# Everyday tools calculators

> Everyday calculators for tips, splitting bills, fuel cost, mileage, sleep, shoe sizes, Roman numerals, encoders and random numbers.

Page: https://calculators.geekmidst.com/categories/everyday

- [Height Calculator](https://calculators.geekmidst.com/calculators/height-calculator.md): Estimate a child’s adult target height and likely range from both parents’ heights with the mid-parental height method of Tanner et al.
- [Bra Size Calculator](https://calculators.geekmidst.com/calculators/bra-size-calculator.md): Find your European bra size from underbust and bust measurements in cm or inches, using the EN 13402 band and cup ranges.
- [Dice Roller](https://calculators.geekmidst.com/calculators/dice-roller.md): Roll dice online, from a single d6 to 100 dice of up to 1,000 sides, with a modifier, each roll listed, and the minimum, maximum and average.
- [BTU Calculator](https://calculators.geekmidst.com/calculators/btu-calculator.md): Estimate the cooling capacity a room air conditioner needs in BTU per hour, kW and tons from the room area, sun, occupants and kitchen use.
- [GDP Calculator](https://calculators.geekmidst.com/calculators/gdp-calculator.md): Calculate gross domestic product from consumption, investment, government spending, exports and imports, with GDP per capita and each component’s share.
- [Electricity Cost Calculator](https://calculators.geekmidst.com/calculators/electricity-calculator.md): Work out how many kilowatt-hours an appliance uses and what it costs to run per day, week, month and year at your own electricity price.
- [Shoe Size Converter](https://calculators.geekmidst.com/calculators/shoe-size-converter.md): Convert adult shoe sizes between UK, US men’s, US women’s and EU, or find your size from foot length in cm or inches, using the standard sizing formulas.
- [Speed Calculator](https://calculators.geekmidst.com/calculators/speed-calculator.md): Calculate average speed from distance and time, or the distance covered or time taken, in km/h, mph, m/s or knots, with times shown as h:mm:ss.
- [Roman Numeral Converter](https://calculators.geekmidst.com/calculators/roman-numeral-converter.md): Convert any whole number from 1 to 3,999 into Roman numerals, or read a Roman numeral such as MCMXCIV back as a number, with the breakdown shown.
- [Golf Handicap Calculator](https://calculators.geekmidst.com/calculators/golf-handicap-calculator.md): Estimate your Handicap Index from your recent 18-hole scores, course ratings and slopes using the World Handicap System rules, plus your course handicap.
- [Sleep Calculator](https://calculators.geekmidst.com/calculators/sleep-calculator.md): Find bedtimes that fit a set wake-up time, or wake-up times for a given bedtime, by counting roughly 90-minute sleep cycles plus time to fall asleep.
- [Tyre Size Calculator](https://calculators.geekmidst.com/calculators/tire-size-calculator.md): Work out a tyre’s overall diameter, sidewall height and revolutions per km from its size (e.g.
- [Mulch Calculator](https://calculators.geekmidst.com/calculators/mulch-calculator.md): Work out how much mulch or bark to buy for a garden bed from its length, width and depth, in cubic metres, litres, cubic yards and bags.
- [Wind Chill Calculator](https://calculators.geekmidst.com/calculators/wind-chill-calculator.md): Calculate the wind chill index from air temperature and wind speed in °C or °F, using the formula adopted by the US and Canadian weather services in 2001.
- [Heat Index Calculator](https://calculators.geekmidst.com/calculators/heat-index-calculator.md): Calculate the heat index (apparent temperature) from air temperature and relative humidity in °C or °F, using the US National Weather Service algorithm.
- [Dew Point Calculator](https://calculators.geekmidst.com/calculators/dew-point-calculator.md): Find the dew point from temperature and relative humidity, or the relative humidity from temperature and dew point, in °C or °F with the Magnus formula.
- [Tip Calculator](https://calculators.geekmidst.com/calculators/tip-calculator.md): Work out the tip for any bill and percentage, the total to pay, and each person’s share when the bill is split evenly.
- [Fuel Cost Calculator](https://calculators.geekmidst.com/calculators/fuel-cost-calculator.md): Estimate the fuel and money a trip will take from the distance, your car’s fuel economy and the fuel price, and split it between travellers.
- [Gas Mileage Calculator](https://calculators.geekmidst.com/calculators/gas-mileage-calculator.md): Work out your car’s real fuel economy from the distance driven and fuel used, shown as MPG (US and UK), km per litre and litres per 100 km.
- [Trip Cost Split Calculator](https://calculators.geekmidst.com/calculators/trip-cost-split-calculator.md): Enter what each traveller paid to get everyone’s fair share and the fewest payments needed to settle up, with optional unequal shares.
- [Wedding Guest Budget Calculator](https://calculators.geekmidst.com/calculators/wedding-guest-budget-calculator.md): See what your guest list costs in total and per guest, how much budget is left, and the largest guest list your budget allows with a contingency.
- [Dog Age Calculator](https://calculators.geekmidst.com/calculators/dog-age-calculator.md): Convert your dog’s age to human-equivalent years using the AVMA chart for small or medium dogs or the 2020 epigenetic formula 16 ln(age) + 31.
- [Pet Daily Water Need Calculator](https://calculators.geekmidst.com/calculators/pet-daily-water-need-calculator.md): Estimate a dog’s or cat’s daily water need from body weight using the veterinary maintenance formulas, minus the water already in its food.
- [Pet Food Portion Calculator](https://calculators.geekmidst.com/calculators/pet-food-portion-calculator.md): Estimate how many calories your dog or cat needs (RER × life-stage factor) and how many cups, cans or grams of its food that is per day and per meal.
- [Cycling Cadence to Speed Calculator](https://calculators.geekmidst.com/calculators/cycling-cadence-to-speed-calculator.md): Turn pedalling cadence, chainring, cog and wheel size into road speed in km/h and mph, with gear ratio, metres of development and gear inches.
- [Golf Stableford Points Calculator](https://calculators.geekmidst.com/calculators/golf-stableford-points-calculator.md): Score a Stableford round: enter par, stroke index and your gross score for each hole and your playing handicap to get points per hole and in total.
- [Baseball Batting Average Calculator](https://calculators.geekmidst.com/calculators/baseball-batting-average-calculator.md): Calculate a baseball batting average from hits and at-bats, plus on-base percentage, slugging percentage and OPS using the official stat definitions.
- [Cricket Net Run Rate Calculator](https://calculators.geekmidst.com/calculators/cricket-net-run-rate-calculator.md): Calculate a team’s cricket net run rate (NRR) across a tournament from runs and overs in each match, using the ICC method with all-out innings at full quota.
- [Cricket Required Run Rate Calculator](https://calculators.geekmidst.com/calculators/cricket-required-run-rate-calculator.md): Find the required run rate in a cricket chase from the target, current score and overs bowled, with runs needed, balls left and current run rate.
- [Basketball Effective Field Goal Percentage Calculator](https://calculators.geekmidst.com/calculators/basketball-effective-field-goal-percentage-calculator.md): Calculate basketball effective field goal percentage (eFG%), plain FG% and true shooting percentage (TS%) from makes and attempts.
- [Tennis Match Win Percentage Calculator](https://calculators.geekmidst.com/calculators/tennis-match-win-percentage-calculator.md): Work out a tennis win–loss percentage for matches, sets and games, and how many wins in a row you need to reach a target win rate.
- [Darts Checkout Calculator](https://calculators.geekmidst.com/calculators/darts-checkout-calculator.md): Enter the score you have left to see whether it can be finished in one visit, the fewest darts needed and one double-out checkout route.
- [Event Seating Capacity Calculator](https://calculators.geekmidst.com/calculators/event-seating-capacity-calculator.md): Estimate how many chairs fit in a room in theatre-style rows from its size, seat width, row spacing, aisles and the space kept clear at the front and back.
- [Venue Occupancy Calculator](https://calculators.geekmidst.com/calculators/venue-occupancy-calculator.md): Check how full a venue is: people present as a percentage of capacity, spaces left, and the headcount at which your alert level is reached.
- [Road Trip Stop Planner Calculator](https://calculators.geekmidst.com/calculators/road-trip-stop-planner-calculator.md): Plan a long drive: rest breaks every few hours, fuel stops from your tank range, total journey time and arrival time, with a stop-by-stop schedule.