Home, food & hobbies
729 everyday calculators for home, cooking and free time: recipes and servings, tips and shared bills, paint and flooring, pets, games and hobbies. Quick answers to the small questions of daily life, free in your browser.
Star Wars marathon calculator
The original trilogy at 121, 124 and 131 minutes runs 376 minutes, or 6 hours and 16 minutes back to back.
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Tablecloth size calculator
A 72 by 36 inch table with a 10-inch drop on each side needs a cloth of 92 by 56 inches. The drop is added at both ends of each side, so the hang comes out even…
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Tesla charging cost calculator
Taking a 75 kWh Tesla pack from 20% to 80% adds 45 kWh, and at 0.16 per kWh that session costs 7.2 in your tariff's currency.
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TikTok time alternatives
Ninety minutes a day on TikTok adds up to 10.5 hours a week and 547.5 hours a year, as much time as 14 workouts a week or about 91 novels a year.
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Time adder
1 hour 45 minutes 30 seconds plus 80 minutes and 90 seconds adds up to exactly 3 hours 7 minutes. Stack podcast chapters, workout intervals or meeting segments…
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Time duration calculator
2 hours 15 minutes 30 seconds plus 1 hour 20 minutes 45 seconds is 3 hours 36 minutes 15 seconds, also shown as 216.25 minutes and 12,975 seconds.
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Time in between
From 1 January at 9:00 to 2 January at 10:30 is 1 day, 1 hour and 30 minutes, or 1,530 minutes in all.
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Toilet paper calculator
Twelve rolls of 200 sheets at 40 sheets a day last 60 days, a little over eight weeks. Check the pack before a warehouse trip or a rental turnover and plan the…
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Toothpaste tube calculator
A 6-ounce tube used twice a day at a pea-sized 0.01 ounce lasts 300 days, while a quarter-ounce blob empties it in 12.
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UK to US shoe size converter
A UK 8 is a US 9 and a UK 5.5 is a US 6.5: the US scale sits one full size above the UK scale for the same gender.
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TV series duration calculator
Five seasons of ten 45-minute episodes is 50 episodes and 2,250 minutes: 37.5 hours of viewing. Check a drama, a rewatch or a limited series before you commit…
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Vacation countdown
From 25 July 2026 to a 15 August departure there are 21 days left, exactly 3 weeks. Type today's date and your trip's start date and get a count that never…
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Wedding countdown
From 20 March 2026 to a wedding on 15 June 2027 there are 1 year, 2 months and 26 days left. Enter the ceremony date and the day you treat as today, and the…
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Well volume calculator
A 6-inch well with 100 feet of standing water holds about 146.88 US gallons. Enter the casing's inside diameter and the water column to know what sits in the…
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Wheel horsepower calculator
With 300 horsepower at the crank and a 15% drivetrain loss, 255 reach the driven wheels and 45 are lost.
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Wizarding currency converter
3 galleons are 1,479 knuts, because a galleon is worth 17 sickles and a sickle 29 knuts. Convert any amount between the three coins and see it as a purse of…
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Words per minute calculator
200 words typed in 4 minutes is 50 words per minute. Enter a finished word count and the elapsed minutes to get a typing speed you can compare across hiring…
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Yes or no
Type a yes or no question and get a single word that never changes for the same wording: "Should I take the new job?" gets no every time.
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Among Us impostor probability
In a 10-player lobby with 2 impostors, your chance of being impostor is exactly 1/5, or 20%, across 45 possible impostor teams.
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Aquarium glass thickness calculator
A 1200 mm panel holding 500 mm of water needs at least 32.4 mm of glass with a safety factor of 3.8, by a simple bending model for float glass.
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Aquarium volume calculator
A tank measured inside at 60 × 30 × 36 cm holds 64.8 liters, also shown in US gallons. Enter length, width and water height in cm, mm, m, inches or feet to size…
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BPM calculator
Eight beats counted in four seconds is 120 BPM: enter the beats you counted and the seconds on your stopwatch to get the tempo and the length of one beat, 0.5 s…
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Gemstone Carat Weight Calculator
A round stone measuring 6.5 × 6.5 mm across and 4 mm deep weighs an estimated 1.0309 carats. Measure length, width and depth, pick one of ten outlines and…
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Chord calculator
C major is C, E and G, stacked at 0, 4 and 7 semitones from the root. Enter a root such as F# or Bb and a type from major to ninths to get the spelled notes and…
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Chord finder
Type C, E and G and the finder names it C major in root position. Enter three or more note names in any octave to get the root, the quality and the inversion of…
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Chord inversion calculator
Put C, E and G into first inversion and you get E, G and C; second inversion gives G, C and E. Enter the notes in root position, choose the inversion number and…
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Chord transposer
Raise C Am F G by 2 semitones and you get D Bm G A, a major second up. Paste one chord or a whole progression, choose the shift up or down, and print a chart…
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Delay and reverb times calculator
At 120 BPM an eighth-note delay is 250 ms and a whole-note reverb tail is 2000 ms, with a 62.5 ms pre-delay to start.
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Diamond Weight Calculator
A round diamond measuring 6.5 by 6.5 by 4 mm weighs an estimated 1.0309 carats. Pick one of ten cut shapes, enter three measurements and get a weight even when…
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Dating theory
At 30, the half-your-age-plus-seven rule gives a partner range of 22 to 46, a 24-year window. Enter a whole-number age to see both bounds of this folk rule; it…
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Harmonic series
The first ten terms of the harmonic series add up to 2.928968253968, just under three, even though each new fraction is smaller than the last.
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Minecraft stack calculator
130 cobblestone is 2 full stacks of 64 plus 2 left over, which takes 3 inventory slots. Enter any item count to get stacks, leftovers and slots for chests…
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MM to carat conversion
A 6.5 mm round brilliant with a specific gravity of 3.52 weighs a little over one carat. Enter the diameter, the cut and the mineral's specific gravity to…
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Song duration calculator
A 32-bar chorus in 4/4 at 120 BPM lasts 64 seconds, or 1:04 on the clock. Enter the tempo, the meter and the measures to know whether a piece fits a set list, a…
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Music transposer
Raise C D E F by two semitones and you get D E F# G: paste a note, a melody line or a chord progression, set the half steps up or down, and copy the transposed…
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Pizza tip calculator
A pizza bill of 40 with a 15% tip split between 2 people means a tip of 6, a total of 46 and 23 each.
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RAID calculator
Four 2 TB disks in RAID 5 give 6 TB of usable space out of 8 TB raw, a 75% efficiency, and one disk can fail.
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Semitone calculator
Concert A at 440 Hz lands on A4 with 0 cents, while 445 Hz is still A4, a few cents sharp: enter any frequency to get the nearest note, its octave and how far…
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Sandbox calculator
An 8 by 4 foot sandbox filled 0.5 ft deep holds 16 cubic feet of sand, which is 32 bags of half a cubic foot each.
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Snowman calculator
Balls with radii of 3, 2 and 1 give diameters of 6, 4 and 2: enter the three radii in one unit and get each diameter plus the total snow volume, the sum of…
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Tip from net price
A net price of 86.4 at an 18% tip gives a tip of 15.55 and a total of 101.95 to pay. Use it for dinners, deliveries, rides and salon bills, with tip and total…
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Witcher monster slayer
A griffin with 320 health against a silver sword dealing 45 per hit needs eight strikes, and 40 points of the last one are wasted: know the count before you…
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Alcohol by volume calculator
An original gravity of 1.050 and a final gravity of 1.010 mean 5.25% alcohol by volume. Enter your two hydrometer readings for beer, cider, mead or wine and you…
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Alcohol dilution calculator
To take 500 ml of a 60% spirit down to 40%, add 250 ml of water for 750 ml in total. Enter the volume, the current strength and the target, and the alcohol…
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BBQ party calculator
For 12 guests, 8 adults and 4 children, over 4 hours, buy 7.5 pounds of meat, 24 side servings, 16 buns, 80 drinks and 24 pounds of ice.
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Brine calculator
2 litres of water at 5% salinity take 100 grams of salt and 50 grams of sugar. Enter the water in litres, millilitres, US gallons or cups and the salinity you…
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Cake pans calculator
Baking an 8-inch recipe in a 9-inch round pan of the same depth takes 1.265625 times the batter, just over a quarter more.
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Chocolate serving calculator
Twenty guests at 25 g each need 500 g of chocolate, exactly five 100 g bars. Enter the guest count, the grams per guest and your bar size, and get the total…
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Coffee kick calculator
Two cups of coffee at 100 mg each keep a useful kick for about 15 hours with typical metabolism. Enter your cups, the caffeine per cup and your clearance rate…
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Coffee ratio calculator
288 ml of kettle water at the default 1:16 ratio calls for 18 g of ground coffee. Enter the water you will pour, keep sixteen to one or set your own ratio, and…
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Cups to pounds converter
A cup of all-purpose flour weighs about 0.26 lb, so two cups come to just over half a pound. Choose the ingredient, enter the cups, fractions included, and get…
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Donut calorie calculator
Two glazed donuts hold 538 kcal, and at 70 kg that takes about three quarters of an hour of steady jogging to burn.
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Egg boiling time calculator
A large egg straight from a 4 °C fridge reaches a creamy 70 °C yolk in just under 6 minutes of rolling boil.
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Grams to tsp converter
Ten grams of water make 2 teaspoons, because water weighs 1 g per milliliter and a metric teaspoon holds 5 ml.
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Healthy coffee calorie calculator
A latte with 180 ml of whole milk and one teaspoon of sugar comes to 136.2 kcal, and the milk alone brings 115.2 of them.
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Ice cream calculator
Eight scoops of vanilla ice cream take 480 ml of cream, 240 ml of milk and 150 g of sugar. Enter how many servings you want, pick vanilla, chocolate or…
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Oil to butter converter
100 g of oil becomes 125 g of butter: butter is only about 80% fat, so you need 25% more of it to put the same fat into your batter. Free in your browser.
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Pancake recipe scaler
Turn a batter card for 8 pancakes into one for 12: every line is multiplied by 1.5, so 190 g of flour becomes 285 g and 350 mL of milk becomes 525 mL.
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Perfect pizza dough calculator
Plan dough by the pie: two 12-inch Neapolitan pizzas at 62% hydration come to two balls of about two hundred eighty-three grams each, already split into flour…
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Pizza party calculator
10 guests eating 3 slices each need 30 slices, so with 8-slice pies you order 4 pizzas and keep 2 slices spare: the count always rounds up to whole pies.
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