Everyday calculators
Everyday calculators for dates, measurements, sewing, candle making, pool salt and other practical tasks.
Square Feet Calculator — Rooms & Floor Plans
Calculate square feet for one room or a full floor plan in exact feet and inches. Add rooms by floor, subtract excluded areas, and estimate materials and cost.
Alcohol Dilution Calculator — Water or Alcohol to Add
Calculate water or stronger alcohol to add, prepare an exact final volume, lower or raise ABV, blend two strengths, and convert U.S. proof.
Water Volume Calculator — Area, Depth & Gallons
Calculate US gallons from square feet and water depth, then plan pools, ponds, tanks, materials and volume conversions with editable examples.
Grade Calculator — Weighted Grades, Final Exam & GPA
Calculate weighted course grades, final exam targets, semester and cumulative GPA, or the GPA needed to reach a goal.
Age Calculator — Exact Age, Days & Next Birthday
Calculate exact calendar age in years, months and days, total elapsed days, hours and minutes, age on any date, and the next birthday.
Candle Wax Calculator
Plan mixed candle sizes, weigh wax and fragrance, and work out complete batches from your ingredient stock.
Circle Skirt Calculator — Pattern & Fabric
Draft quarter to double-circle skirts with seam allowances, a waistband and fabric layout. Print an actual-size panel on A4 or Letter paper.
Continuous Bias Binding Calculator
Plan continuous bias tape from a fabric square. See full-width bands, discarded fabric and the square needed for your required length.
Diagonal Quilt Backing Calculator
Plan a diagonal quilt backing with a rounded cut length, illustrated slide and seam, straight-panel comparison and printable cutting plan.
Fabric Yardage & Cut Layout Calculator
Lay out rectangular fabric pieces with grain controls. Calculate yardage to buy, check an existing cut and print your cutting worksheet.
Free Date Calculator — Days Between Dates & Age Calculator
Calculate days between dates, add or subtract days, or find an exact age with weekend controls, clear steps, and instant visual results.
Pool Salt Calculator
Work out how much pool salt to weigh, how many bags to buy and what remains. Preview salt levels and compare high-salt readings.
Quilt Backing Calculator — Yardage & Panel Layout
Compare horizontal and vertical backing layouts, seam placement and fabric yardage. Get a proportional diagram, cutting list and printable plan.
Quilt Binding Calculator — Strips & Fabric Yardage
Plan straight-grain binding strips, account for joins and end allowance, and buy the right fabric increment. Includes a visual cutting plan and printable list.
Time Calculator — Hours, Duration & Timesheet
Add or subtract time, find hours between clocks, total timesheet shifts and pay, or convert duration units with clear visual results.
Tip Calculator — Tax, Split Bill & Custom Shares
Calculate restaurant tips before or after tax, split the bill equally or by custom shares, round the total, and see exactly what each person pays.
Yarn Calculator
Estimate blanket yarn from a weighed swatch, preview repeating stripes, subtract partial balls and print a colour-by-colour shopping list.
