Construction Calculations
Construction Blog
Worked calculation guides for contractors and estimators: formulas, unit conversions, unit-system crossover and ordering advice — every example checked against the MixTally calculators.
ConcreteOct 4, 20267 min read
How to Calculate Concrete Volume for a Slab
The slab volume formula, two worked examples in imperial and metric units, unit conversions, and how to turn a geometric volume into a sensible order quantity.
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ConcreteOct 5, 20268 min read
How Much Concrete Do I Need for a 10x10 Slab?
Exact volume for a 10x10 slab at 4 and 6 inches, the bag counts that follow from it, and how much extra to order for site conditions.
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PaintOct 9, 202610 min read
How Much Paint Do I Need for a Room? Formula & Examples
The paint quantity formula worked through on a 12 × 12 ft room: wall area, door and window deductions, coverage per coat, ceiling paint and allowances.
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