Music & Audio Calculators
Studio maths for gear that has no sync button. The BPM to ms calculator turns one tempo into a matrix of straight, dotted and triplet note values from 2 bars down to 1/64, in milliseconds for delay pedals and outboard units and in hertz for LFOs and modular clocks. It also suggests tempo-locked reverb pre-delay and decay times for a hall, room or tight ambience, and gives the length of any number of bars in seconds and samples at 44.1, 48 or 96 kHz for chopping loops. Tap the tempo in, click a value to copy it, and every page keeps its settings in the link. There are pages for delay times, LFO rates, reverb pre-delay and sample length, and ready-made tables for common tempos from 60 to 174 BPM.
All music & audio calculators
- BPM to MS CalculatorOne tempo in, every straight, dotted and triplet note out in milliseconds and hertz, with reverb pre-delay and loop lengths. Tap the tempo, click to copy.
- Delay Time CalculatorTempo-synced delay times for pedals, outboard units and plugins without a sync button: every note value straight, dotted and triplet, ready to copy.
- BPM to Hz Calculator for LFO RatesSynced LFO, tremolo and clock rates in hertz for any note value, for synths, modular and pedals whose rate knob reads Hz.
- Reverb Pre-Delay CalculatorTempo-synced pre-delay and decay times for a hall, a large or small room and a tight ambience, so the reverb tail clears before the next hit.
- Sample Length Calculator from BPMHow long a loop of any number of bars lasts at a tempo, in milliseconds, seconds and samples at 44.1, 48, 88.2 or 96 kHz, in any time signature.
- 60 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 60 BPM, the tempo of ambient, film score and slow ballads, straight, dotted and triplet.
- 70 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 70 BPM, the tempo of dub, downtempo, slow R&B and half-time trap, straight, dotted and triplet.
- 80 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 80 BPM, the tempo of lo-fi hip-hop, soul and slow rock, straight, dotted and triplet.
- 85 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 85 BPM, the tempo of boom bap and classic East Coast hip-hop, straight, dotted and triplet.
- 90 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 90 BPM, the tempo of hip-hop, reggae and mid-tempo pop, straight, dotted and triplet.
- 100 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 100 BPM, the tempo of reggaeton-adjacent pop, funk and pop ballads, straight, dotted and triplet.
- 110 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 110 BPM, the tempo of funk, indie and disco-influenced pop, straight, dotted and triplet.
- 120 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 120 BPM, the tempo of pop, house and the default tempo in most DAWs, straight, dotted and triplet.
- 128 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 128 BPM, the tempo of house, EDM and progressive house, straight, dotted and triplet.
- 140 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 140 BPM, the tempo of dubstep, grime, trap and UK garage, straight, dotted and triplet.
- 150 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 150 BPM, the tempo of hardstyle, Jersey club and fast trap, straight, dotted and triplet.
- 160 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 160 BPM, the tempo of footwork, juke, jungle and punk, straight, dotted and triplet.
- 170 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 170 BPM, the tempo of drum and bass, liquid and jungle, straight, dotted and triplet.
- 174 BPM to MS: Delay Time ChartEvery delay time, LFO rate and reverb pre-delay at 174 BPM, the tempo of drum and bass and neurofunk, straight, dotted and triplet.
Questions about music & audio calculators
How do I convert BPM to milliseconds?
Divide 60,000 by the BPM to get one quarter note: 120 BPM is 500 ms. Halve it for an eighth note, multiply by 1.5 for a dotted note and by 2/3 for a triplet. The BPM to ms calculator lists every note value at once.
How do I set a reverb pre-delay to tempo?
Use a short note value, such as a 1/64 note for a hall or 1/128 for a room, so the reverb starts just after the dry sound and stays out of its way. The reverb pre-delay calculator gives pre-delay and decay for four spaces at your tempo.