Calculators

Shows how long an audiobook will take at 1.25x, 1.5x, 2x, or any custom playback speed you enter.

Calculates the real-time duration of any video or audio file when played at a non-standard speed multiplier.

Adds or subtracts hours, minutes, and seconds between multiple time values and shows the total duration.

Tallies worked hours from start and end times across multiple shifts, giving a daily or weekly total.

Adds or subtracts days, weeks, months, or years from any date to find a past or future target date.

Counts the exact number of days between two calendar dates, with options to exclude weekends or holidays.

Computes your exact age in years, months, and days from a birthdate to today or any reference date.

Finds the date of an upcoming anniversary given a start date and shows how many days remain until it.

Determines a deadline date by adding a specified number of business or calendar days to a start date.

Calculates a product or contract expiry date by adding a shelf-life or term duration to a start date.

Estimates a projected lifespan date based on birth year using statistical life expectancy data.

Splits a price into net amount and VAT at a country-specific rate, or adds VAT to a net figure.

Calculates the GST component of a price or adds GST to a base amount using a rate you specify.

Computes monthly mortgage repayments from loan amount, interest rate, and term, with a full amortization schedule.

Calculates monthly repayments and total interest for any personal or auto loan given principal, rate, and term.

Determines the annual interest rate implied by a loan's principal, monthly payment, and repayment period.

Projects the future value of an investment with compound interest, including optional regular contributions.

Computes the sale price and saving amount when you apply a percentage discount to an original price.

Shows how much Stripe deducts per transaction so you know the exact amount that lands in your account.

Breaks down PayPal's percentage and fixed fee to reveal net payout or the gross amount to charge.

Calculates the Cash App instant-transfer fee so you can see how much reaches the recipient.

Shows Fiverr's seller commission deduction and buyer service fee for any order amount.

Estimates Venmo's instant-transfer surcharge so you know the net amount after withdrawing earnings.

Breaks down Etsy listing, transaction, and payment processing fees to reveal your true profit per sale.

Computes the mean of a set of numbers you enter, along with the sum, count, minimum, and maximum values.

Solves all three percentage problems: find the percent, find the value, or find the total from any two inputs.

Calculates your overall course grade from individual assignment scores and their respective weightings.

Finds the missing width or height to maintain an exact aspect ratio when scaling images or video frames.

Estimates YouTube channel ad revenue based on view count, CPM, and engagement rate you supply.

Estimates TikTok creator fund earnings from video view counts using typical per-view pay rate ranges.