All Calculators

Calculate instructional days, class meeting days, and contact hours for any academic semester.

Calculate a future or past date by adding or subtracting business days. Skips weekends and public holidays automatically.

Calculate your exact age in years, months, and days from your date of birth. Find your total days lived and days until your next birthday.

Count working days between dates or add business days to a start date with U.S. and German holiday calendar options.

Calculate the exact number of days between two dates with standard, inclusive, and business day modes.

Calculate how many days in a month. Find days in each month, average working days in month, and convert 90 days in month to months.

Calculate total days, working days, and weekend days for any year. Includes leap year detection.

Calculate days remaining until a target date, with weeks, months, and hours breakdown.

Calculate your statutory teaching load, track actual hours, and instantly determine your weekly overtime or underload balance.

Work out your dog's due date and whelping window from the breeding date — canine gestation averages 63 days, with a normal range of 58 to 68 days.

Calculate the exact morning and evening golden hour start and end times for any location and date to perfectly plan your photography or outdoor event.

Convert weeks to hours or hours to weeks instantly.

Calculate exact grading time and visualize how weekend exam marking pushes your weekly teacher workload past the legal 41-hour limit.

Calculate your remaining weeks of life based on the 4,000 Weeks philosophy and actuarial data.

Convert months to minutes using the average month length.

Convert months into nanoseconds, seconds, minutes, days, weeks, and years using the mean Gregorian month.

Calculate exact legal maternity leave dates (Mutterschutz) in Germany, including post-birth extensions and school holiday overlaps for teachers.

Calculate exactly how long until you turn 18. Enter your birth date for a precise countdown in days, hours, and weeks.

Calculate weekend days, full weekends, and working days for any month and year.

Score a fantasy football stat line under standard, half-PPR, or full-PPR rules, with a breakdown of passing, rushing, and receiving points.

Calculate your overthinking level and second date probability based on post-date anxiety indicators

Calculate baseball slugging percentage (SLG) from at-bats and each kind of hit, weighting singles, doubles, triples, and home runs — plus total bases and batting average.

Calculate win percentage from a win-loss-tie record, with ties counted as half a win, ignored, or counted as games — plus total games and win-loss ratio.

Convert sensitivity settings between Counter-Strike 2 and Valorant for perfect muscle memory transfer.

Calculate the point-buy cost of your six D&D 5e ability scores against the 27-point budget, with points spent and remaining and instant validity checking.

Calculate trading fees based on your Broker Relations and Accounting skill levels.

Calculate the minimum Strength stat required to wield any weapon effectively in Kenshi. Avoid the Combat Speed penalty by knowing exactly how much Strength you need.

Calculate precise portal coordinates between the Overworld and Nether dimensions. Link portals correctly for fast travel via Nether Highways.

Estimate the per-throw chance of catching a wild Pokémon from its catch rate, HP, Poké Ball, and status condition using the Gen III/IV capture formula.

Calculate your XP gain multiplier and estimate actions needed to level up in Project Zomboid. Optimize your skill training with Fast Learner and skill books.

Interactive Stardew Valley crop profit chart - find the best crops for maximum gold per day with fertilizer and processing options.

Calculate how much it costs to level up your Steam profile. Estimate XP needed, card sets required, and total cost based on your current and target level.

Calculate the total value of your Steam library, cost per hour, and played vs unplayed breakdown.

Calculate Steam Community Market fees including transaction fee and publisher fee for any item listing.

Check if your Steam purchase is eligible for a refund based on ownership period and playtime.

Calculate how much you save during Steam sales based on discount tier and number of games.

Estimate how much disk space your Steam game library needs based on game types.

Plan your Steam sale budget by estimating wishlist costs and potential sale savings.

Calculate net profit from World of Warcraft Auction House sales, accounting for the 5% AH cut and deposit fees.

Estimate mowing productivity in acres per hour from your cutting width, ground speed, and efficiency — plus hours per acre and time to finish an area.

Find exact morning and evening blue hour times for your location. Plan your photography shoot with our calculator, featuring weather viability and phase splits.

Use our planet visibility calculator to find out which planets are visible tonight. Get exact altitude, direction, and moon glare data for your location.

Find the right ski length for your height, ability, and skiing style, with a suggested range to shop within.

Find the recommended surfboard volume in litres for your weight, ability, and fitness — with a suggested range to shop within.

Convert your exam percentage to the 15-point KMK grading scale used across all German states. Instantly see your Notenpunkte, Schulnote, and how close you are to the next grade.

Calculate your ACT composite score from the four section scores (English, Math, Reading, Science) and see the national percentile rank.

Free AP Calculus AB score calculator and BC score calculator. Predict your exam score (1-5) with AP Calculus score distribution data.

Work out how much concentrate and water to mix for a given dilution ratio like 1:10, for any target volume.

Calculate the error quotient and grade points for language exams.

Find out exactly what you need on your final exam to hit your target course grade. Enter your current grade, desired grade, and the final's weight.