All SpecWhale tools

Search common aspect ratios for screens, video, and images.

Search common video frame rates and typical uses.

Search common measurement units and symbols.

Search common envelope sizes for print and mailing.

Search common display density labels and approximate PPI ranges.

Calculate display pixel pitch from pixels per inch.

Estimate comfortable screen viewing distance from diagonal size and multiplier.

Estimate projected image size from throw distance, throw ratio, and aspect ratio.

Estimate transfer time from file size and real-world transfer speed.

Estimate how many photos fit on a memory card from average file size.

Calculate timelapse frames from capture interval and shooting duration.

Estimate final timelapse video length from shoot duration, interval, and FPS.

Convert a bitrate into estimated gigabytes per hour.

Estimate total render time from frame count and seconds per frame.

Calculate cache hit rate from hits and misses.

Calculate service uptime from downtime minutes in a period.

Calculate allowed downtime from an uptime SLA and period length.

Calculate sell-through rate from units sold and units received.

Estimate days of inventory on hand from stock and daily sales.

Calculate refund rate from refunded orders and total orders.

Calculate cost per lead from campaign spend and leads generated.

Estimate lead value from close rate and average customer value.

Calculate revenue needed to cover fixed costs at a target gross margin.

Estimate marketplace fees and net revenue from sale price and fee rates.

Calculate new price and revenue lift from a price increase.

Calculate monthly saving needed for a future target amount.

Estimate doubling time for prices or populations using the Rule of 70.

Calculate buy or sell amount needed to restore a target allocation.

Calculate budget category percentages from monthly income.

Calculate the remaining gap between current savings and a target.

Estimate monthly interest-only payment from principal and annual rate.

Estimate daily calorie target from maintenance calories and desired surplus.

Estimate sweat rate from weight change, fluid intake, and workout time.

Estimate weekly sleep debt from target and actual sleep.

Calculate running or cycling power-to-weight ratio.

Calculate heart rate reserve from max and resting heart rate.

Calculate room volume from length, width, and ceiling height.

Calculate wall area from room perimeter and wall height.

Estimate countertop square footage from length and depth.

Estimate driveway sealer needed from area, coats, and coverage.

Estimate compost volume for a garden bed from area and depth.

Estimate electrical load from voltage, amperage, and circuit count.

Calculate the discriminant of a quadratic equation ax^2 + bx + c.

Calculate a base number raised to an exponent, including negative or fractional powers.

Calculate a weighted grade from three score and weight pairs.

Estimate margin of error for a proportion using confidence z-score and sample size.

Calculate unit rate from quantity and total value.

Estimate hotel cost by room count, nights, taxes, and travelers.

Estimate trip budget from lodging, food, transport, activities, and buffer.

Calculate layover time from arrival and departure clock times.

Calculate mileage reimbursement from distance and rate.

Estimate approximate collision probability for random IDs using the birthday bound.

Calculate one-time-password validity window from step size and allowed drift.

Estimate allowed requests in a period from rate limit and window size.

Estimate backup verification coverage from backups, sample size, and checks per month.

Calculate elapsed hours between two times entered as 24-hour clock values.

Calculate paid shift hours after subtracting an unpaid break.

Add daily work hours into a weekly total and estimate overtime hours.

Convert decimal hours into whole hours and minutes.

Round worked minutes to a chosen payroll rounding interval.