Free Online Calculators
Finance, math, health, construction, and everyday tools in one searchable catalog.
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Tuckpointing Calculator — Mortar, Bags, Labor & Cost
Heat Loss Calculator — Walls, Windows & Air Leakage
Rainwater Harvesting Calculator — Tank Size & Daily Balance
Wallpaper Calculator — Rolls, Pattern Repeat & Cost
Brick & Block Calculator — Units, Pallets & Mortar
Tile Layout Calculator — Square Feet, Edge Cuts & Boxes
Paint Calculator — Gallons, Liters, Cans & Cost
Tubing Capacity Calculator
Annular Space & Capacity Calculator
Attic Ventilation Calculator & NFA Plan
Baluster Spacing Calculator — Verified Layout & Marks
Baseboard Calculator — Boards & Cut List
Calculator descriptions
Tuckpointing Calculator — Mortar, Bags, Labor & Cost
Estimate tuckpointing and repointing from wall area or measured mortar-joint length. Calculate joint footage, mortar volume, whole bags, labor hours and cost.
Heat Loss Calculator — Walls, Windows & Air Leakage
Estimate design heat loss through walls, windows, ceiling, floor and air leakage, with an editable BTU/h and kW breakdown.
Rainwater Harvesting Calculator — Tank Size & Daily Balance
Compare rainwater tanks using a storm and dry spell or your daily rainfall data. See water supplied, shortages, overflow and the reserve left each day.
Wallpaper Calculator — Rolls, Pattern Repeat & Cost
Estimate wallpaper rolls for rooms or separate walls. Account for strip rounding, trim, straight or half-drop repeat, reserve, reusable offcuts, leftover length, and cost.
Brick & Block Calculator — Units, Pallets & Mortar
Estimate new brick, breeze-block and glass-block walls. Calculate courses, edge cuts, whole units, pallets, installation mortar and material cost.
Tile Layout Calculator — Square Feet, Edge Cuts & Boxes
Compare centered tile layouts and both orientations, then calculate square footage, edge cuts, tiles, boxes, waste, grout and cost.
Paint Calculator — Gallons, Liters, Cans & Cost
Estimate paint for rooms, walls, and ceilings. Subtract doors and windows, set coats and coverage, and see gallons or liters, cans, leftover paint, and cost.
Tubing Capacity Calculator
Calculate tubing capacity from a common size and weight, actual ID, or OD and wall thickness; total stepped strings and plan pump volume, time and strokes.
Annular Space & Capacity Calculator
Calculate annular space capacity and volume, solve target fill length, total stepped intervals, and estimate bottoms-up strokes and circulation time.
Attic Ventilation Calculator & NFA Plan
Compare retained vent openings with rounded additions and the actual extra vent length or slots available.
Baluster Spacing Calculator — Verified Layout & Marks
Plan baluster counts and exact centre marks across one or more railing bays. Check every clear gap after rounding marks to your tape increment.
Baseboard Calculator — Boards & Cut List
Turn measured wall runs into boards to buy and a labelled cutting plan. Allow for saw cuts, fitting, stock ends and spare boards.
