Articles and guides
How to Estimate Concrete for a Slab Without Over-Ordering
Measure once, allow for thickenings and waste, and order the right amount of concrete the first time.
September 26, 2026ArticleMetric vs Imperial: A Practical Conversion Guide for Building and DIY
Feet to metres, squares to square metres, and why a "2 by 4" isn't 2 by 4 inches.
September 26, 2026ArticleHow to Measure a Room Once for Paint, Flooring, Tiles and Skirting
Take five measurements and you can price the whole room, from floor to ceiling.
September 26, 2026ArticleRoof Pitch Explained: Degrees, Percent and Ratios
A 25% roof is not a 25° roof. Here is how the three ways of describing pitch fit together.
September 26, 2026ArticleHome Loan Repayments Explained: Rate, Term, Offset and Extra Repayments
A worked $600,000 example showing what really moves the total cost of a home loan.
September 26, 2026ArticleCompound Interest: Why Starting Ten Years Earlier Beats Saving Twice as Hard
$200 a month from age 25 grows to more than double the same savings started at 35.
September 26, 2026ArticlePercentages in Everyday Life: Pay Rises, Discounts, GST and Price Changes
Why 20% off plus 10% off isn't 30% off, and other everyday percentage traps.
September 26, 2026ArticleA Backyard Makeover by the Numbers: Soil, Mulch, Gravel and Pavers
One backyard, four materials, and every quantity worked out before the first delivery.
September 26, 2026ArticleHow to Size a Rainwater Tank for an Australian Home
The right tank size depends on three numbers: roof area, rainfall and how much water you'll use.
September 26, 2026ArticlePlanning a Timber or Composite Deck: Layout, Materials and Quantities
Work from the ground up: footings, bearers, joists, then boards, with a full take-off for a typical deck.
September 26, 2026ArticleThe Math Equation Solver: A Practical Guide to Order of Operations and PEMDAS
Mathematics is unforgiving, one misplaced bracket or a skipped step in the order of operations can turn a correct-looking expression into a wrong answer. The Math Equation Solver at Metric Unit Calculator is a compact, browser-based tool built to evaluate numerical expressions the right way, from simple arithmetic to exponents, roots, logarithms and trigonometric functions. Here's how to get the most out of it.
July 23, 2026About our articles and guides
Clear explanations, practical examples and useful guidance for making the most of every calculator.