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.
Hot desk utilization rate calculator
36 desks booked out of 48 available is a 75% utilization rate. Enter the day's bookings and the desks people could actually reserve, and get one consistent…
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Order a Book Series by Publication or Chronological Order
A prequel published third, such as The Founding Voyage, moves to the top of the list in chronological order.
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Seeded coin flip simulator
12 flips with the seed demo-2026 always give 5 heads and 7 tails, in the same order every time. Enter how many flips you want and any text as the seed to get…
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Seeded dice roller
Three six-sided dice with the seed campaign-round-7 always roll 5, 5 and 3, for a total of 13. Choose the dice, the sides and a text seed so every player…
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Pick a random name from a list with a reproducible seed
With the seed team-lunch-2026, the 4 names Avery, Blake, Casey and Devon always come out in the same order.
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Leftover food safety window
Cooked meat that went into the fridge on 20 July 2026 should be eaten between 23 and 24 July, a window of 3 to 4 days.
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Convert oven temperature scale
Switch an oven setting between Celsius, Fahrenheit and British gas marks: 180 °C is 356 °F, closest to gas mark 4.
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Travel packing list generator
Enter 7 days, hot weather and a beach trip and you get a checklist of 57 items in five groups, from passport and sunscreen to 8 pairs of socks.
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Complementary room color scheme
Start from a wall colour such as #6B8E9F and get a pale trim #E4E6E6 in the same hue plus a contrasting accent #9E6E56 from the opposite side of the colour…
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Pet food portion calculator
An 18 kg dog with normal activity needs about 978.8 kcal a day, roughly 272 g or 2.72 cups of reference dry food.
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Houseplant watering schedule calculator by pot size
A pothos in a 6-inch pot gets a check every 7 days; smaller pots dry sooner and larger ones hold moisture longer.
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Scale Recipe Ingredient Quantities by Serving Count
Going from 4 to 10 servings multiplies everything by 2.5: 300 g of flour becomes 750 g and 2 eggs become 5.
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Convert recipe cooking units
One US cup of flour is about 125 g, while a cup of honey weighs far more: pick the ingredient and convert between cups, spoons, milliliters, grams and ounces…
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Newborn feeding schedule calculator
Enter your baby's age in weeks and see the usual feeding pattern: at 4 weeks that is 6 to 10 feeds a day, every 2.5 to 4 hours, with 3 to 5 ounces per feed.
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Baby growth percentile lookup
A 24-month-old girl who weighs 12 kg lands in the 50th-to-85th percentile band. Enter age in months, sex and one weight or height to see the band and the…
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Split household chores schedule
Four chores shared by three roommates complete a full rotation in 12 weeks, and weekly loads are never more than one chore apart.
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Flashcard spaced repetition calculator
A card reviewed on 5 August 2026 with a 10-day interval and a recall score of 4 comes back in 25 days, on 30 August 2026.
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Split a gift budget among recipients by priority
A gift budget of 100 split by priority weights of 3, 2 and 1 gives 50, 33.33 and 16.67, which add up to exactly 100.
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Convert pet age to human years
A 3-year-old medium dog is about 29 in human years, not 21: early years count far more than later ones.
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Estimate time to finish a reading list
Two books of 412 and 304 pages at 30 pages a day, starting on 25 July 2026, end on 7 and 18 August: 716 pages in 25 days.
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Build exam study schedule
With Math weighted 3, Physics 2 and History 1, a 4-hour study day gives Math 2 hours, and over 10 days that is 20 of your 40 hours.
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Assign wedding table seating
14 guests at tables of 8 become 2 tables: the bride's family and the college friends fill the first, the groom's family and two guests with no group sit at the…
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APA citation generator
A 2020 book by John A. Smith becomes Smith, J. A. (2020). *The practice of everyday research*. Academic Press.
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Convert GPA to a 4.0 scale
An 87 average on a 100-point scale becomes 3.48 on the 4.0 scale. Enter the GPA and the highest value its own scale allows, then choose a straight proportion or…
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Compare text similarity
Two sentences that share 3 of their 19 distinct three-word runs score 15.79% similar. Compare a draft with a source, or two revisions, and see how much exact…
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Trip carbon footprint calculator for car, train, plane, or bus
A 350 km train trip comes to 14.35 kg of CO2e for one passenger. Choose car, train, plane or bus, enter the distance in kilometres and see the estimate together…
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MLA citation formatter
Toni Morrison's Beloved from 1987 becomes Morrison, Toni. *Beloved*. Alfred A. Knopf, 1987. Enter author, title, year and publisher, choose book, article…
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Commute cost calculator
Driving 12 miles each way at 28 mpg with 15 a day in parking costs 18 a day, while a 6.5 transit fare saves 253 a month.
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Check interview answer STAR structure
An answer that sets the scene, states your own task, lists the steps you took and ends with a measured outcome scores 100, with all four STAR parts present.
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Resume length check
A 620-word resume with 4 years of experience is too long: the guideline is one page, about 550 words, so trim roughly 70 words.
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Salary negotiation range calculator
With a market rate of 85,000 and the 75th percentile, you ask between 106,250 and 110,500 and aim for 108,375.
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Pomodoro study session planner
In 120 minutes, 25-minute focus blocks with 5-minute rests fit exactly 4 pomodoro cycles: 100 minutes of work and 20 of breaks, with nothing left over.
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Generate a Wedding Planning Countdown Checklist
For a wedding on 19 June 2027 planned from 5 August 2026 you get 318 days to go and ten stages, from twelve months before to the day itself, each with its…
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Scale a cocktail recipe to any batch size
A one-glass recipe of 2 oz gin, 0.75 oz lemon juice and 0.5 oz syrup becomes 16, 6 and 4 oz for eight drinks.
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Estimate homebrew ABV from original and final gravity readings
An original gravity of 1.052 and a final gravity of 1.012 give a drop of 0.040 and about 5.25% alcohol by volume.
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Suggest a Wine Pairing Category for a Dish
Plainly cooked fish calls for a crisp dry white served well chilled: pick the main profile of your dish, red meat, seafood, spicy food or dessert, and get the…
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Seeded bingo card generator
Seed 2026 with a 5 × 5 card and numbers 1 to 75 always produces the same grid: 24 unique numbers around an open center square.
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Board game playtime calculator
A game that takes 60 minutes with 2 players comes to 96 minutes with 5, if each extra player adds 12.
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Card game deck mana curve calculator
A 100-card deck with an average cost of 3.33 is split into eight cost groups, and any group 10 percentage points away from the reference shape is flagged.
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D&D Encounter Difficulty Calculator and XP Budget
Four level-3 characters against two CR 1 monsters is a medium fight: 400 monster XP becomes 600 after the group multiplier, right at the party's medium…
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Video Game Backlog Completion Time Calculator
Three games of 18, 27.5 and 12 hours at 10 hours a week take 5.75 weeks, so the list is done in week 6.
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Raffle ticket number generator
Start at 98, ask for 5 tickets with a width of 6, and you get 000098 to 000102, each number exactly once.
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Seeded random team generator
Split seven people into three teams and you get groups of three, two and two; reuse the same list and the same seed and you get exactly the same teams again, so…
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Trivia night round scoring calculator with wagers and leaderboard
Enter your rounds, mark each team's answers right or wrong and add the final wager: in the sample game two teams finish tied on 45 and share first place, while…
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Build a book club reading schedule with meeting checkpoints
A 320-page book read at 12 pages a day with meetings every 14 days becomes two checkpoints: pages 1 to 168, then 169 to 320.
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Candle Burn Time Remaining and Wax Estimate Calculator
A candle rated for 50 hours that has burned 12.5 has 37.5 hours, or 75 %, left; add its 320 g of wax and you get an estimated 240 g remaining.
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Compare appliance total cost of ownership over a fair lifespan
If appliance A lasts 12 years and B lasts 8, both are compared over 8 years of energy plus their purchase price.
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Battery replacement annualized cost calculator
A battery rated for 1000 cycles and used 250 times a year lasts 4 years, so a quarter of its price falls on each year.
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Garden bed plant spacing calculator
A bed 240 cm by 120 cm planted 30 cm apart fits 8 rows by 4 columns: 32 plants with no space left over.
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Calculate grass seed coverage needed for a lawn
A 5,000 square foot lawn with seed that covers 1,000 square feet per pound needs 5 pounds for a new lawn, or 3 pounds to overseed at 60% of that rate.
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Calculate mulch volume needed for a garden bed in cubic feet and bags
A 240 square foot bed covered 3 inches deep needs 60 cubic feet of mulch, exactly 30 bags of 2 cubic feet.
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Calculate a seed-starting date from the last frost
With an average last frost on April 20, 2026 and a packet that says 8 weeks indoors, start seeds on February 23, 2026, which is 56 days earlier.
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Daily affirmation picker
Pick a date and a category and get one affirmation that stays fixed for that day: 2026-08-03 in the confidence category always returns a line about handling…
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Seeded icebreaker question picker for work, parties, and family
The work list with the seed “monday-team-sync” always opens with “Which skill would you most like to learn from someone on this team?” Pick work, party or…
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Baking pan size converter
Moving a recipe from a 9 by 13 inch pan to an 8 by 8 inch pan means multiplying every ingredient by about 0.547, or 45.3% less.
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Egg size substitution calculator
Three large eggs make 150 ml, the same as 3.409 medium eggs, so use three whole medium eggs plus part of a fourth.
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Brine Salt and Water Ratio Calculator
2,000 ml of water at a 2.5% brine needs 50 grams of salt, and a sugar-to-salt ratio of 0.4 adds 20 grams of sugar.
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Coffee-to-water brew ratio calculator
At 1:16, 480 g of water takes 30 g of coffee grounds, and 30 g of grounds takes 480 g of water. Enter the ratio and whichever amount you know, and the other…
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Restaurant food cost percentage calculator
A dish whose ingredients cost a quarter of its menu price runs a 25% food cost. Enter the cost per serving and the current price, add a target percentage, and…
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Slow cooker time converter
A stew that cooks 45 minutes in the oven needs 6 to 8 hours on LOW or 3 to 4 hours on HIGH. Enter the time from your recipe and get both ranges with their…
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