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.
Grain to water ratio lookup
One cup of quinoa needs two cups of water and about 15 minutes of covered simmering. Type a grain, from barley and farro to bulgur or teff, add the dry amount…
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Burger grilling time by thickness and doneness calculator
A 1-inch patty cooked to medium needs 3.5 minutes per side, or 210 seconds. Pick the thickness, from half an inch to an inch and a half, and the doneness, then…
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Grilling Fish Time by Thickness Calculator
A fish portion 1.5 inches thick needs about 15 minutes on the grill in total, following the ten-minutes-per-inch rule.
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Sauce Reduction Volume Calculator
Turn an instruction to reduce by 40% into a level you can check: 750 mL of sauce should simmer down to 450 mL, with 300 mL evaporated, in the unit you started…
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Vegetable steaming time lookup
Broccoli florets steam in 4 to 6 minutes, with 5 as the usual mark. Pick one of fifteen common vegetables and get the time range, the typical target and the cut…
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Turkey brine recipe calculator
A 12-pound turkey takes 0.75 gallon of water (12 cups), 0.75 cup of salt and 0.375 cup of sugar, scaled from the classic 16-pound batch.
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BBQ dry rub scaling calculator by meat weight
8 pounds of trimmed meat call for 120 grams of rub at 15 grams per pound: 36 g of brown sugar, 30 g of smoked paprika, 24 g of kosher salt and smaller amounts…
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Bubble tea tapioca ratio calculator
A 500 ml bubble tea takes 300 ml of brewed tea, 125 ml of milk and 75 ml of cooked tapioca pearls.
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Chemex coffee ratio calculator
Six Chemex cups take 56.25 g of ground coffee and 900 ml of water. Enter how many 150 ml cups you plan to brew and get both amounts at a steady 1:16 ratio…
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Brewed coffee caffeine estimator
18 g of coffee pulled as espresso gives an estimated 216 mg of caffeine, at 12 mg per gram. Enter the dry coffee weight and pick one of eleven brew methods to…
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Coffee water from bean weight calculator
An 18 g dose of beans at sixteen parts water to one makes 288 ml of brew water. Weigh your coffee, keep the default ratio or set another, and read the kettle…
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Corned beef cure calculator
1 kg of beef takes 50 g of salt, 25 g of sugar, 2.5 g of Prague Powder #1 and 1,000 ml of cover water at the standard rates.
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Pour-over coffee ratio calculator
For 350 mL of water at 1:16 you need 21.88 g of coffee: enter how much you plan to pour and your ratio, and get the dose and water weight for your dripper.
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Beer Bitterness IBU Estimator
28 grams of hops at 5.5% alpha acid, boiled for 60 minutes in 20 litres of beer, give about 17.76 IBU.
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Food calorie density calculator
A 100 g portion with 250 kcal has a calorie density of 2.5 kcal per gram, or 250 kcal per 100 g. Enter the calories and the edible weight of a portion to…
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Calories per serving from total calculator
A 2,400-calorie pot split into 8 servings gives 300 calories per serving. Enter the whole recipe's calorie total and the number of portions it makes to get the…
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Cocktail ABV calculator
50 ml of a 40% spirit, 25 ml of a 20% liqueur and 75 ml of mixer make a 150 ml drink holding 25 ml of pure alcohol, one sixth of its volume.
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Cocktail batch scaling calculator
Scaling a one-drink card to eight turns 60 ml of gin into 480 ml and 30 ml of lemon juice into 240 ml, with every line multiplied by the same factor.
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Drinks per guest estimator
Twenty guests at a three-hour party need 90 drinks: the estimator multiplies guests by hours by 1.5 drinks per guest per hour, then rounds up to whole drinks…
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Party punch batch calculator
Scale a punch tested for 8 to a bowl for 24: 250, 500 and 750 of spirit, juice and mixer become 750, 1500 and 2250, with the amount per glass and each share…
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Wine Bottles for Guests Calculator
60 wine drinkers over a 4-hour event need 48 bottles: one glass per guest per hour, five glasses to a bottle, always rounded up.
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Appetizer count per person calculator
24 guests at a cocktail-style party need 144 appetizer pieces, at six per person. Choose light, cocktail or heavy service and the guest count, and get a…
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Food refrigerator storage time
Raw chicken keeps 1 to 2 days in the fridge, cooked leftovers 3 to 4, and whole apples 4 to 6 weeks.
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Servings to total weight calculator
24 servings at 125 g each need 3000 g of food: multiply your guest or container count by one fixed portion weight and get the total to cook or buy.
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Cooking start time calculator from serve time and step durations
Serve at 19:30 with steps that add up to 65 minutes and you start at 18:25: list every step, and the start time comes back with a clear note when it falls on an…
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Recipe total cost calculator
Find what a recipe really costs: 1.5 kg of flour, 4 eggs and 0.25 kg of butter, each multiplied by the price of one unit, give a cost per ingredient and the…
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Side dish quantity per person calculator
Twelve guests at half a cup of coleslaw each need 6 cups in total. Enter the headcount and the portion you serve per person, in cups, grams, ounces or scoops…
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Airy disk diameter calculator
In green light of 550 nm at f/8, the Airy disk is 10.736 µm across: enter wavelength and f-number to see how large diffraction blur gets as you stop down, and…
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Cropped image resolution
A 20% crop on a 6000 × 4000 photo leaves 4800 × 3200 pixels, so 24 MP drop to 15.36 MP: enter the size and a percentage or a ratio and check the remaining…
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Full-frame equivalent focal length calculator
A 35 mm lens on a 1.5 crop sensor frames like 52.5 mm on full frame: enter the focal length on the lens and your camera's crop factor to compare angles of view…
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Extension Tube Magnification Calculator for Close-Up Photography
A 25 mm extension tube on a 50 mm lens adds 0.5× magnification, and with a lens that already reaches 0.15× the total is about 0.65×: enter tube length and focal…
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Focus stacking frame count calculator
A subject 30 mm deep with 4 mm of depth of field per shot and 0.25 overlap needs 10 frames at 3 mm steps: enter depth, depth of field and overlap before you…
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Horizontal angle of view calculator
A 50 mm lens on a 36 mm wide full-frame sensor covers just under forty degrees across the frame: enter focal length and sensor width in the same unit to see…
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ND filter shutter speed calculator
A 3-stop ND turns 1/125 s into 0.064 s, about 1/15: enter your base shutter and the filter strength in stops to get the exact new time and the filter factor.
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Stacked ND Filters Total Stops Calculator
A 3-stop and a 6-stop ND stacked together give 9 stops of reduction: enter two to twenty filter ratings and see the total, the exposure multiplier and the share…
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Time-lapse Shooting Duration Calculator
600 frames at a 5-second interval keep the camera busy for 2995 seconds, or 49 minutes 55 seconds: enter the frame count and interval to plan batteries…
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Depth of field from magnification
At life size, f/8 and a 0.03 mm circle of confusion, total depth of field is only 0.96 mm: enter magnification, aperture and circle of confusion to plan…
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Flash inverse square falloff calculator
Moving a flash from 2 m to 4 m leaves only 25% of the light, a loss of 2 stops: enter the old and new distances and get the change in stops and the compensation…
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Looney 11 lunar exposure calculator
For a full Moon at ISO 100 and 1/100 second, the Looney 11 rule gives f/11: enter any ISO and shutter speed and get the aperture that keeps the Moon equally…
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Moon diameter in pixels calculator
With a 1000 mm lens or telescope and 3.76 µm pixels, the Moon spans about 2404 pixels: enter the real focal length and pixel pitch to plan framing, mosaics and…
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Shutter Speed After Stops Change Calculator
Add two stops to 1/125 and the shutter becomes 0.032 s: enter a starting speed and a signed stop change, positive for more light and negative for less, and get…
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Stops between two apertures calculator
Going from f/2.8 to f/5.6 costs 2 stops, a quarter of the light: enter the aperture you have and the one you plan to use to see the signed difference and how…
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Video bitrate for memory card
A 64 GB card with a 5 % margin leaves 60.8 GB for a 120-minute recording: enter card size, recording time, audio and margin to see the highest video bitrate…
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Bar duration from time signature calculator
In 4/4 at 120 BPM a beat lasts 0.5 seconds and a whole bar exactly 2. Enter the top and bottom numbers of the time signature and the tempo to time edits, lights…
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BPM from tap intervals calculator
Taps at 0, 500, 1000 and 1500 ms leave three gaps of 500 ms, which is a tempo of 120 BPM. Enter the moments you tapped along to a groove and get a tempo you can…
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Cents to frequency ratio calculator
An interval of 700 cents multiplies frequency by 1.49830707687668, and 1,200 cents doubles it. Enter any interval in cents, positive to go up or negative to go…
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Delay time from BPM calculator
At 120 BPM a quarter-note echo lasts 500 ms, its dotted version 750 ms and a whole note 2000 ms. Enter the tempo once and read straight, dotted and triplet…
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Reverb decay time from BPM calculator
At 120 BPM one beat lasts 500 ms, so a reverb tail of 4 beats needs a decay of 2000 ms: enter the tempo and the number of beats and get the time to type into…
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MIDI ticks per note value calculator
At 480 PPQ a quarter note spans exactly 480 MIDI ticks: pick the resolution and a note value, straight, dotted or triplet, and get its tick length plus a table…
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Slow-motion playback duration calculator
Ten seconds shot at 120 fps and played at 24 fps runs for 50 seconds, five times slower: enter the clip length and both frame rates to plan edits, music cues…
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Star trail stacking calculator
A one-hour star trail shot as 30-second frames needs 120 exposures: enter the length of each frame and the trail time you want, and see the frame count, the…
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Cents to pitch-bend value calculator
Bending up 100 cents on a synth set to a 2-semitone range takes a pitch-bend value of 12288, which is 4096 above the 8192 center.
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Chord inversion notes calculator
C major is C–E–G in root position, E–G–C in first inversion and G–C–E in second. Enter a root and a chord type to see every position for piano voicings, theory…
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Interval between two notes calculator
F-sharp 4 up to C5 is a diminished fifth of 6 semitones, while C4 to F-sharp 4 is an augmented fourth.
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Key from sharps or flats count
Two sharps mean D major or B minor, with F-sharp and C-sharp in the signature. Enter how many sharps or flats you see, from none to seven, and name the key for…
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Relative major key calculator
F-sharp minor and A major share three sharps, so A major is its relative major: enter a minor key and get the major key a minor third, three semitones, higher…
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Transpose key by interval calculator
Transpose C Am F G up a perfect fifth and you get G Em C D: enter a key or a progression, choose an interval by name or in semitones, and read the new key and…
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Expected highest die calculator
Roll two six-sided dice and keep the higher one, and the long-run average is exactly 161/36. Enter how many dice and how many sides, and see that average plus…
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Probability dice sum at most calculator
Two six-sided dice total 7 or less in 21 of 36 rolls, exactly 7/12. Enter the number of dice, their sides and your ceiling to see the precise odds for a rule, a…
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Distance between adjacent frets calculator
On a 25.5-inch scale, the gap from the nut to the first fret is 1.431205026617 inches. Enter your scale length and the fret pair to mark a fretboard blank, set…
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