All SpecWhale tools

Estimate affordable monthly rent from income and target rent percentage.

Estimate net paycheck from gross pay and withholding percentage.

Estimate break-even months for a refinance from closing costs and monthly savings.

Calculate simple interest from principal, rate, and time.

Adjust a value by an annual inflation rate over time.

Calculate savings rate from income and saved amount.

Estimate one-rep max from weight and repetitions using the Epley formula.

Estimate target training heart rate using age, resting heart rate, and intensity.

Estimate daily protein target from body weight and grams per pound.

Estimate walking calories from body weight, distance, and calories per mile per pound.

Estimate pavers needed from project area and paver size.

Estimate drywall sheets from wall area and sheet size.

Calculate total R-value from insulation layers.

Estimate lumens needed from room area and target lumens per square foot.

Estimate daily solar energy from panel watts, sun hours, and system efficiency.

Calculate flow rate from gallons collected and time.

Calculate the slope between two points on a line, given their coordinates.

Calculate distance between two points on a coordinate plane.

Calculate the midpoint between two coordinate points.

Calculate percent error from measured and accepted values.

Calculate n choose k combinations, the number of ways to pick k items from n.

Calculate permutations for n items taken k at a time.

Calculate the remainder after dividing one number by another (a mod b).

Convert an amount using a manually entered exchange rate.

Estimate arrival time from departure time and trip duration.

Estimate driving range from fuel tank size and fuel economy.

Estimate electric vehicle charging cost from battery size, charge added, and energy price.

Convert hours, minutes, seconds, and frame rate into total video frames.

Convert a frame count and frame rate into seconds and minutes.

Calculate how many pixels a video processes per second from resolution and FPS.

Calculate compression ratio and savings from original and compressed image sizes.

Estimate cropped image height from target width and aspect ratio.

Calculate thumbnail dimensions for a fixed-width grid.

Calculate audio latency from buffer size and sample rate.

Convert audio sample counts to milliseconds.

Convert tempo into beat, half-beat, and quarter-beat delay times.

Calculate frequency from MIDI note number using A4 = 440 Hz.

Estimate how much of a monthly data cap a daily usage amount consumes.

Estimate monthly transfer from average Mbps usage.

Estimate storage cost from amount stored and a manually entered monthly rate.

Convert CSS viewport width units to pixels.

Convert CSS viewport height units to pixels.

Convert rem units to pixels from a root font size.

Convert pixels to CSS viewport width units.

Calculate average ad frequency from impressions and reach.

Calculate email open rate from opens and delivered emails.

Calculate email click rate from clicks and delivered emails.

Calculate gross profit and gross margin from revenue and cost of goods sold.

Calculate labor cost percentage from labor cost and sales.

Calculate food cost percentage for restaurants and recipes.

Calculate support average handle time from talk, hold, and after-call work time.

Calculate occupancy rate from occupied and available units or rooms.

Calculate revenue per employee from annual revenue and headcount.

Calculate net revenue retention from starting, expansion, contraction, and churned revenue.

Calculate CAC from sales and marketing spend and new customers.

Calculate lead-to-customer conversion rate.

Calculate simple payback period from investment and annual cash flow.

Calculate gross rent multiplier from property price and annual rent.

Calculate capitalization rate from net operating income and property value.

Calculate loan-to-value ratio from loan amount and property value.