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Everyday Calculators
Age, date, time, size, conversion helpers and other handy everyday calculators. 42 free tools that run in your browser, no sign-up needed.
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Age CalculatorFind your exact age and next birthday countdown.Teaching ClockInteractive analog clock with draggable hands, time in words and a telling-time quiz.Credit Utilization CalculatorCalculate per-card and overall credit utilization and how much to pay to reach 30% or 10%.Carbon Footprint CalculatorEstimate your yearly CO2e from driving, flights, electricity, gas and diet in tonnes.Online CalculatorFree basic and scientific calculator with keyboard support, memory keys and a history tape.Screen Time CalculatorSee your daily screen time per year and over your lifetime, and what else you could do.Book Reading Time CalculatorHow long a book takes to read from its pages or words and your reading speed.Pages per Day CalculatorHow many pages to read each day to finish a book by your date, with a reading schedule.Fabric Yardage CalculatorHow many yards or meters of fabric to buy for your pieces, width, seams and pattern repeat.Print Size CalculatorPrint size from pixels and DPI, max print size by megapixels, and pixels needed for any print.Candle Wax CalculatorWax and fragrance oil weights for a batch of candles from jar volume or size, plus a wick hint.Guitar Fret Position CalculatorDistance from the nut and between frets for any scale length (12-TET), with CSV export.Knitting Gauge CalculatorTurn a swatch into gauge, stitches to cast on for any width and a resized pattern count.Mouse Sensitivity Calculatorcm/360, inches/360 and eDPI from DPI and sensitivity, and convert sens between games.Prorated Rent CalculatorProrated rent for a move-in or move-out date, by days in month, 365-day year or 30-day month.Rent Increase CalculatorNew rent and % increase, check against a rent cap, and project rent over the coming years.Song Length CalculatorSong duration from BPM, time signature and bars, or the bars needed for a target length.Time Lapse CalculatorShots, clip length and storage for a time lapse, or the interval you need for a target clip.Feet and Inches CalculatorAdd, subtract, multiply and divide feet-inch-fraction lengths with tape-measure results.Group Expense SplitterTrack shared group expenses in any currency and see who owes whom with the fewest payments.Tablecloth Size CalculatorFind the tablecloth size for any round, rectangle, square or oval table and drop length.Bead CalculatorHow many beads and spacers you need for a bracelet or necklace, with pattern repeats.Blanket Size CalculatorBlanket dimensions by type, stitches to cast on or chain from your gauge, and a yarn estimate.Bleach Dilution CalculatorHow much bleach per gallon or quart of water for a sanitizing or disinfecting ppm or ratio.Cross Stitch Fabric CalculatorFinished cross stitch design size and fabric cut size from stitch count and Aida count.Pipe Slope CalculatorDrain pipe drop from slope and length, or slope from drop, with DWV minimum checks.Fabric Shrinkage CalculatorFind fabric shrinkage % from a test wash or fiber type and how much extra fabric to buy.Food Storage Time GuideHow long food keeps in the fridge, freezer and pantry, with use-by dates and leftover tips.Granny Square Blanket CalculatorHow many granny squares a blanket needs (rows × columns), with joins, border and yarn.Half Square Triangle CalculatorCut square size, number of squares and fabric yardage for HSTs: 2, 4 or 8 at a time.Halfway Point CalculatorFind the halfway point between two or more addresses on a map, with the nearest city and distances.Herbicide Mix CalculatorProduct per tank, tank fills and total herbicide from the label rate, tank size and area.Knitting Increase and Decrease CalculatorEvenly spaced increase or decrease instructions like K5, M1 for flat or round knitting.Laundry Symbols DecoderLook up any care label symbol (wash, bleach, dry, iron, dry clean) and get plain-English tips.Macrame Cord Length CalculatorHow long to cut each macrame cord, folded or unfolded, and how much cord in total.Paracord CalculatorHow much paracord a bracelet needs for your wrist and knot, plus the right buckle size.Picture Frame Mat CalculatorFind the mat opening and border widths for any frame, with bottom weighting and a cut diagram.Quilt Backing CalculatorBacking yardage, panels to cut and seam direction for 42 in or 108 in wide fabric.Quilt Binding CalculatorTotal binding length, number of strips to cut and fabric yardage for any quilt size.Range Hood CFM CalculatorRecommended range hood CFM from stove type, BTUs, width, mounting and duct run.Walking Time CalculatorHow long it takes to walk a distance or number of steps, or how far you walk in a given time.Yarn Substitution CalculatorHow many skeins of a different yarn to buy for a pattern, with a weight compatibility check.
About Everyday Calculators
Handy calculators that don't fit elsewhere, from age and screen time to carbon footprint and credit utilization. Quick answers to the small questions that come up during the day.
Most used here: Age Calculator, Teaching Clock and Credit Utilization Calculator.