ABV Calculator
Estimate a fermented drink's alcohol by volume from its original and final gravity readings using a simple gravity-based approximation.
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Calculators
Calculators
Planning tools related to live music & nightlife, with visible assumptions and clearly explained results.
Alcohol Dilution Calculator
Estimate the final alcohol by volume after combining a measured spirit with a non-alcoholic mixer, assuming the mixer contains no alcohol and the liquid volumes are additive.
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Alcohol Units Calculator
Estimate alcohol units from a drink's volume and alcohol by volume (ABV). One UK unit is 10 millilitres of pure alcohol, so the estimate is volume in millilitres multiplied by ABV percentage and divided by 1,000.
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Amplifier Headroom Calculator
Estimate an amplifier's headroom in decibels by comparing its rated output power with the expected peak power requirement. This is a power-ratio estimate and does not account for speaker impedance, clipping behavior, or room acoustics.
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Audio Buffer Latency Calculator
Estimate the nominal time represented by one audio buffer from its frame count and sample rate. The result excludes conversion, transport, and any additional buffers.
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Audio Recording Storage Calculator
Estimate the uncompressed audio data size from channel count, sample rate, bit depth, and recording duration. The result is in bytes and excludes file-container, metadata, and compression overhead.
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Band Merchandise Profit Calculator
Estimate gross profit from band merchandise sales by subtracting the per-item unit cost from the sale price and multiplying by the number of items sold. Enter consistent per-item costs and prices. This estimate excludes other expenses unless you include them in unit cost.
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BPM Tap Tempo Calculator
Convert the time between evenly spaced musical taps into an estimated tempo in beats per minute (BPM).
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BPM to Milliseconds Converter
Convert a tempo in beats per minute (BPM) into the duration of one beat in milliseconds. Enter a tempo to see the corresponding beat interval.
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Carbonation Volume Calculator
Estimate carbonation volume from measured dissolved carbon dioxide and beverage volume. Enter CO₂ mass in grams and beverage volume in liters to calculate volumes of CO₂ per volume of beverage.
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Catering Cost Calculator
Estimate a catering event budget from guest count, per-person food and service costs, a fixed setup fee, and a contingency allowance. The estimate assumes the per-person amount covers the catering package you enter and excludes costs you do not include.
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Cocktail Batch Calculator
Scale a cocktail recipe from its original serving count to a larger batch and estimate the total liquid volume in milliliters from the measured ingredient amounts.
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Cocktail Cost Per Serving Calculator
Estimate the ingredient cost of one cocktail serving from the bottle prices, bottle sizes, recipe amounts, and servings made. This worksheet covers liquid ingredients only and does not include labor, garnish, waste, tax, or overhead.
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Cocktail Dilution Calculator
Estimate the final drink volume and dilution percentage by adding the water contributed by melted ice to a cocktail's starting volume.
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Cocktail Alcohol by Volume Calculator
Estimate a mixed cocktail’s alcohol by volume from the spirit volume and ABV, plus the volumes of other ingredients. This estimate assumes volumes are additive and does not account for ice melt.
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Concert Capacity Calculator
Estimate the audience capacity of a concert space from its usable audience area, space allowance per person, seating layout, and an optional reserved-area deduction. This is a planning estimate, not an approved occupancy limit.
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Conference Room Capacity Calculator
Estimate a room's attendee capacity from its usable floor area and the space allowance per person. The estimate assumes a single seating layout and does not account for aisles, furniture, accessibility clearances, or local occupancy rules.
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Dance Floor Size Calculator
Estimate dance floor area from the number of guests and the share expected to dance at once. This simple planning model assumes 5 square feet per simultaneous dancer and does not account for room layout or accessibility clearances.
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Decibels to Watts Converter
Convert a power level in dBm to watts using the standard logarithmic power relationship. Enter the level in dBm to see its equivalent power in watts.
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Decibel Distance Calculator
Estimate sound level at a new distance in a free field using the inverse-square relationship. Enter the measured decibel level and distance, then the distance where you want the estimate.
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Music Delay Time Calculator
Calculate an audio delay interval in milliseconds from a song's tempo and a selected beat subdivision. This gives a timing starting point for performance and sound design.
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Drink Alcohol Percentage Calculator
Estimate the alcohol by volume (ABV) of a drink by dividing the volume of pure alcohol by the drink's total volume and multiplying by 100. Enter both volumes in the same units.
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Drink Price Calculator
Estimate a drink's menu price from ingredient costs, preparation labor, and a target gross margin. This worksheet assumes the entered costs are per serving and excludes taxes, overhead, and other fees.
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Drink Tip Calculator
Estimate a beverage bill's tip and total, then see how the tip splits per person. Enter the bill before tip, choose a tip percentage, and enter the party size.
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Event Budget Calculator
Estimate an event budget from guest count, venue cost per guest, catering cost per guest, and fixed event expenses. This planning estimate uses the entered amounts and does not include unentered costs.
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Event Ticket Price Calculator
Estimate the ticket price needed to cover your event budget and reach a target profit margin, based on fixed costs, per-attendee costs, expected paid attendance, and the margin you want to earn.
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Guitar Capo Fret Frequency Calculator
Estimate the frequency of a guitar string after placing a capo at a selected fret. Enter the string’s open frequency in hertz and the fret number to calculate the raised frequency using equal temperament.
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Guitar Scale Length Calculator
Estimate a guitar's scale length from the measured nut-to-12th-fret distance. Enter the measurement in inches to calculate the distance from the nut to the bridge saddle, assuming the 12th fret is halfway along the scale.
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Guitar String Tension Calculator
Estimate the tension of a single guitar string from its scale length, tuning frequency, and string weight per unit length. This simplified model uses the standard vibrating-string relationship and assumes consistent units.
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Party Drink Calculator
Estimate the total drinks to prepare for a gathering from guest count, event duration, drinks per guest per hour, and a planning buffer. This is a simple quantity estimate, not a prediction of individual consumption.
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Party Food Serving Calculator
Estimate how many food servings to plan for a gathering based on guest count, event duration, and serving style. This is a planning estimate; adjust for your menu and guests.
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Playlist Duration Calculator
Estimate the total playlist runtime from the number of tracks and their average duration. The estimate assumes every track matches the average duration you enter.
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Proof to ABV Converter
Convert an entered US proof value to alcohol by volume (ABV) using the standard relationship that proof is twice the ABV percentage.
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Reverb Time (RT60) Estimator
Estimate a room's reverberation time using the Sabine equation from room volume and total equivalent sound absorption. This simplified estimate assumes a reasonably diffuse sound field and does not model frequency-dependent behavior.
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Seating Capacity Calculator
Estimate the number of seated guests that fit in an event area using its usable floor area and the space allocated per seat. This planning estimate assumes the entered area already excludes stages, bars, service zones, and other obstructions.
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Song Duration Calculator
Estimate a song's playing time from its bar count, beats per bar, and tempo. The estimate assumes a steady tempo and uninterrupted performance.
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Sound Speed in Air Calculator
Estimate the speed of sound in ordinary air from its Celsius temperature using a standard temperature-based approximation. The result is an approximate speed in meters per second.
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Speaker Coverage Area Calculator
Estimate the combined nominal coverage area of multiple speakers by multiplying the number of speakers by the stated coverage area per speaker. Enter both values in square feet.
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Speaker Impedance Calculator
Estimate the nominal total impedance of identical speakers wired in series or parallel. This arithmetic model assumes every speaker has the same nominal impedance and does not model frequency-dependent impedance, amplifier limits, or mixed wiring networks.
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Speaker Power and Wattage Calculator
Estimate a speaker system's combined nominal power from the number of speakers and each speaker's rated power. This is a simple arithmetic estimate and does not determine amplifier compatibility or safe operating levels.
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Spotify Royalty Estimate Calculator
Estimate a simple gross streaming royalty amount from plays and an assumed per-stream rate. This worksheet does not predict Spotify's actual payout or account for rights splits, deductions, or contract terms.
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Standard Drink Calculator
Estimate the number of standard drinks in a beverage from its serving volume, alcohol by volume, and the ethanol-gram definition you choose. Definitions vary by country and organization.
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Tablecloth Size Calculator
Estimate the minimum rectangular tablecloth dimensions needed for your table and desired drop on each side.
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Tuning Frequency Calculator
Calculate the frequency of a musical pitch from a reference frequency and a semitone offset using the 12-tone equal-temperament formula.
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Wedding Alcohol Calculator
Estimate the number of standard drink servings to plan for a wedding reception using guest count, event length, and an assumed average drinks per guest per hour. This is a planning estimate, not a purchasing list or a measure of safe consumption.
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Wine Alcohol Content Calculator
Estimate the alcohol by volume (ABV) of a wine blend from its starting volume and the volume and ABV of wine or spirits added. This simplified estimate assumes volumes add directly and does not account for fermentation or volume changes.
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Wine Calorie Calculator
Estimate calories from wine by multiplying the wine volume by its stated calories per 100 milliliters. This arithmetic estimate uses the values you provide and does not identify a wine's actual nutrition content.
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Wine Cellar Capacity Calculator
Estimate bottle capacity from usable shelf width, shelf depth, vertical clearance, and the average space each bottle occupies. The estimate assumes a simple rectangular grid and does not account for racks, access aisles, or irregular layouts.
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Wine Per Person Calculator
Estimate the wine needed for a gathering from guest count, event duration, wine servings per guest per hour, and bottle size. The estimate assumes a steady serving rate and does not account for other beverages or individual preferences.
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Wine Shipping Cost Calculator
Estimate a shipment's listed delivery charge from the carrier base charge, package weight, distance band, and number of bottles. This is a simple planning estimate and does not include taxes, insurance, or seller-specific fees.
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