Explore our full library of free online calculators covering construction, finance, health, fitness, cooking, and more. Every tool is fast, accurate, and easy to use.
Overview Formula 01What this calculator tells you This calculator turns a simple count of classes attended and classes held into your attendance percentage — and then answers the two questions students actually ask: how many classes can I skip and still be fine, and how many must I attend to reach my target. Enter what … Read more
Overview Formula 01What this calculator tells you This calculator turns a win–loss–tie record into a winning percentage — the single number that lets you compare teams or players who have not played the same number of games. Enter your wins and losses (and ties, if your sport has them), and you get the percentage, the … Read more
Overview Formula 01What this calculator does This calculator reports the average of a set of time durations. On the left, paste in a list of time durations, one per line. The results are reported on the right. The calculator reports the mean of the times, the running total of the times, the number of times, … Read more
Overview Formula 01What this calculator tells you This board and batten calculator lays out an interior accent wall with evenly spaced vertical battens and a batten at each end. Enter the wall width, how tall the battens run, your batten width and the gap you want between them, and it returns the number of battens, … Read more
Overview Formula 01What this calculator tells you A mortgage recast lowers your monthly payment by applying a lump-sum payment to your principal and then re-amortizing the remaining balance over the same term at the same interest rate. This calculator shows your new principal-and-interest payment, how much lower it is each month, your new balance, and … Read more
Overview Formula 01What this calculator tells you This calculator finds the area of a space in square meters (m²) — the SI derived unit of area, defined by the National Institute of Standards and Technology (NIST) as the area of a square one meter on each side. Choose a shape, pick the unit you measured … Read more
Overview Formula 01What this calculator tells you Enter two dates of birth and this calculator shows the exact age gap between two people — down to the years, months, and days — plus where that gap sits on a simple scale from negligible to very large. It is one of our free everyday calculators, so … Read more
Overview Formula 01What this calculator tells you This calculator checks whether your cables fit inside a cable tray within the limits of Article 392 of the National Electrical Code (NFPA 70). Choose the tray type and inside width, enter the overall outside diameter of your cable and how many you are running, and it returns … Read more
Overview Formula 01What BMR means Your Basal Metabolic Rate (BMR) is the amount of energy your body uses to perform basic functions at rest. This includes functions such as breathing, circulation and cell repair and it accounts for the largest portion of your total daily energy expenditure. For this reason BMR is frequently used as … Read more
Overview Formula 01What this calculator tells you This calculator checks whether your conductors fit inside a raceway within the limits of the National Electrical Code (NFPA 70). Pick the conduit type and trade size, the conductor insulation and size, how many conductors you are running, and whether it is a standard run or a short … Read more
