Home improvement, cooking and HVAC. Enter your measurements and we help you work it out.
48 calculators, all free and with no sign-up.
Paint, tile, concrete, flooring, insulation and 13 more tools for measuring and buying materials.
18 calculatorsCookingGrams and cups by ingredient, recipe scaling, baker's percentage, tin sizes and oven temperatures.
16 calculatorsHVACWhat size air conditioner you need, BTU, cooling capacity, energy use and what it costs to run.
14 calculatorsThree complete routes, with the calculators and guides in the order you actually need them.
From measuring the wall to knowing how many tins to carry home.
From a recipe in cups to one that works in your kitchen.
From the room to the unit, and from the unit to the bill.
No calculator hides its assumptions: if one does not fit your case, you change it.
No calculator matches that word. Try another one.
Each calculator does one thing and does it properly. Enter your measurements, press calculate, and you get the result with the workings: where every number comes from, which assumptions were used, and how much material to actually buy, rounded up to whole packs and pieces.
Everything is calculated in your browser. No accounts, no sign-up, and your inputs are never sent to a server.
A lot of online calculators oversimplify. We try to do the opposite:
DomusCalc works out quantities for planning and buying. It does not replace a structural calculation, an installation design or professional advice when the job calls for it.