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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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Organ pipe diameter scale calculator
Enter a speaking length and a halving ratio to get the pipe's internal diameter: with Normalmensur, a pipe one octave above the 155.5 mm 8′ C comes out well…
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PCM Audio Bitrate Calculator
Stereo 24-bit audio at 48000 Hz produces 2.304 Mbps, or 288000 bytes per second, before any compression.
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Polyrhythm Alignment Calculator
Three against four fits on a grid of 12 pulses: one part plays every 4 pulses, the other every 3, and they meet only at the start and end of the cycle.
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Pythagorean tuning interval ratio calculator
Seven pure fifths reduced into one octave give exactly 2187/2048: enter any signed number of 3:2 fifths and get the exact fraction, the decimal ratio, the…
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Tuning error in cents calculator
Playing 442 Hz against a 440 Hz target is just under eight cents sharp: enter the frequency you hear and the one you want, and get the signed error in cents and…
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Chess material balance calculator
When White has 8 pawns and no bishop against Black's 7 pawns and a bishop, the count is 33 to 35: Black is ahead by 2 points.
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D&D Encumbrance Threshold Calculator by Strength
A Strength of 14 means you are encumbered above 70 pounds and heavily encumbered above 140. Enter any score from 1 to 30 and settle carrying questions without…
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D&D initiative modifier calculator
A Dexterity modifier of +3, the Alert feat's +5 and a +1 magic item give an initiative modifier of +9.
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D&D point buy cost calculator
The array 15, 14, 13, 12, 10 and 8 costs 9, 7, 5, 4, 2 and 0, exactly 27 points. Enter your six scores and see at once whether your build fits the campaign…
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D&D spell attack bonus calculator
A proficiency bonus of +3 and a spellcasting modifier of +4 give a spell attack bonus of +7. Enter the two numbers from your sheet and check the total at a…
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D&D XP to Next Level Calculator
A character with 14,500 total XP is level 6 and needs 8,500 more to reach level 7 at 23,000. Check it right after awarding encounter XP, without scanning the…
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d20 success chance vs DC calculator
With a +5 modifier against DC 15 you need a natural 10 or higher: 11 of the 20 faces succeed, a 55 % chance.
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Dice notation min and max calculator
2d6+3 can never land below 5 or above 15, and that gives 11 possible totals. Paste a damage line, an attack roll or a homework expression and see its full…
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Chess performance rating calculator
Scoring 4.5 out of 6, or 75 %, against opponents averaging 1800 is a performance of 2000, a 200-point edge over the field.
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Knitting stitches for width calculator
Count 22 stitches over 4 inches, ask for 18 inches, and you get 99 stitches to cast on. Pick nearest, up or down rounding and see the width that whole count…
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D&D challenge rating to XP calculator
A CR 5 monster is worth 1800 XP on the fifth-edition table. Enter any challenge rating from 0 to 30, including 1/8, 1/4 and 1/2, and get the award without…
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Bingo card combinations calculator
Classic 75-ball bingo with an open center square allows 552,446,474,061,128,648,601,600,000 different cards.
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Go Area Score Calculator
Black with 45 points of territory and 120 stones scores 165, while White's 42 and 116 plus 6.5 komi reach 164.5: Black wins by half a point.
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MTG mana curve calculator
Twelve one-drops, 14 two-drops, 10 three-drops, 6 four-drops and 2 five-drops make 44 cards and 104 total mana value, an average a little below two and a half.
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Scrabble bingo bonus calculator
Seven tiles worth 10, 1, 1, 10, 10, 1 and 1 make a 34-point word, and the bingo bonus lifts it to 84.
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Sudoku Grid Validity Checker
One repeated digit can ruin a Sudoku long before you notice it. Paste the nine rows of your grid, even with only 30 cells filled, and every cell breaking a rule…
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Poker starting hand combinations calculator
Pocket aces come in exactly 6 combinations, a suited hand like AKs in 4 and an offsuit one in 12: type a preflop label or a plain phrase and see the count with…
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Poker Pot Odds Calculator
Facing a bet of 25 into a pot of 100 gives you 4:1 odds, so your hand needs at least 20 % equity to break even: enter the pot and the amount to call to see the…
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Beading Strand Length Calculator
Twenty-four 8 mm beads plus spacers of 2, 2, 3 and 3 mm take up 202 mm of strand, or 20.2 cm. Enter the beads, their size along the hole and each spacer to…
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Crochet Flat Circle Rounds Calculator
Six rounds of single crochet that start with 6 stitches end at 36, adding 6 every round: 6, 12, 18, 24, 30, 36.
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Cross stitch floss estimator
A chart with 2450, 980 and 125 stitches in three colors needs 4 skeins at 1800 stitches per skein with a 12 % allowance.
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Stitch gauge from swatch calculator
Counting 22 stitches and 30 rows over 4 inches gives a gauge of 5.5 stitches and 7.5 rows per inch.
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Quilt Batting Size Calculator for Shrinkage and Trimming
A 60 by 80 inch quilt top with a 4-inch margin per edge and 3 % shrinkage needs batting of 69.8557 by 90.4742 inches.
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Quilt block count calculator
A 60 by 80 quilt with 12-inch blocks takes 30 blocks, 5 across and 6 down, covering 60 by 72 and leaving 8 for borders.
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Bias binding yardage calculator
A 60 by 80 quilt needs 290 of binding, and with 2.25-inch strips a fabric square 25.54408 on each side gives it as one continuous strip.
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Soap making water amount calculator
At 33 % concentration, 142.5 g of lye takes just over twice its weight in water, and that water makes up 67 % of the solution.
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Candle Container Wax Weight Calculator
An 8 US fl oz jar filled to 90 % with soy wax at 0.86 g per ml holds under 8 oz of wax by weight. Enter the volume, its unit and the wax to get the weight in…
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Diamond painting drill count calculator
A 30 × 40 cm canvas with 2.5 mm drills holds 120 columns by 160 rows, or 19200 drills. Enter the painting size in cm, mm or inches, plus colors and a spare…
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Boards for Panel Width Calculator
A 30-inch panel from 5.5-inch boards, losing 0.125 per board at the edges and keeping 0.5 for trimming, takes 6 boards, with 1.75 of extra width to spare.
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Bowling Average Calculator for League Standings and Handicap
1742 pins over 9 games is a precise average of 193.556 but a league average of 193: enter total pinfall and games to see both, the leftover pins and how many…
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Darts 501 score remaining calculator
Score 60 from 501 and 441 is left: enter the score you still need and the points from the visit to get the new total, with a clear signal when the visit busts…
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Golf course handicap calculator
A 12.4 index on tees with slope 130, course rating 72.1 and par 72 gives a course handicap of 14 strokes: enter your index and the scorecard figures to know…
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Golf strokes received per hole calculator by stroke index
A course handicap of 20 over eighteen holes means one stroke on every hole and a second on stroke indexes 1 and 2.
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Bicycle gear ratio calculator
A 50-tooth chainring with an 11-tooth cog turns the rear wheel more than 4 times per crank revolution, while 32 with 36 turns it less than once: enter both…
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Bike speed from gear and cadence calculator
Pedalling at 90 rpm in a 2.5 gear on a wheel with a 2.105 m rolling circumference gives about 28.42 km/h: enter cadence, the gear ratio or tooth counts and the…
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Calories burned from MET calculator
Thirty minutes at MET 8 for a 70 kg person burns about 280 kcal, at a rate of 560 kcal per hour: enter the MET value, your weight and the duration to get the…
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Bouldering grade conversion calculator
V5 converts to 6C and a Font 7A comes back as V6: type a grade from either scale and get its counterpart from the consensus table climbers and guidebooks use…
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Scuba Air Consumption at Depth Calculator
With a SAC of 18 litres a minute at 20 m in salt water, you breathe 54 litres a minute, so 1800 litres of usable gas last about 33.33 minutes: enter SAC, depth…
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