Guides
Practical how-to guides for home, DIY, and construction projects, each paired with a free calculator to run the numbers.
Learn how to calculate GPA with the credit-weighted formula, see a full worked example, and understand weighted vs unweighted and term vs cumulative GPA.
How do savings bonds earn interest? See how Series EE bonds compound semiannually, the 20-year doubling guarantee, and a free redemption-value calculator.
How much should you tip at restaurants, for delivery, bars, and salons? Tipping norms, tax rules, and a free calculator with worked examples.
BMR vs TDEE explained: the exact Mifflin-St Jeor formulas, activity multipliers, and a full worked example so you know which number to actually eat.
What is a mortgage recast? It re-amortizes your loan after a lump-sum payment, lowering the monthly payment at the same rate and term. See how it works and the costs.
How to calculate prorated rent: divide monthly rent by the days in the month, then multiply by the days you occupy. See all three methods and worked examples.
How to calculate overtime pay: multiply your hourly rate by 1.5 for hours over 40 a week. See the formula, the rules, salaried and bonus cases, and examples.
How to calculate cap rate: divide net operating income by the property value. See the formula, a worked example, what counts as NOI, and what a good cap rate is.
How to calculate dividends: work out annual income, dividend yield, yield on cost, and DRIP growth with simple formulas, worked examples, and a free calculator.
How many steps in a mile? On average 2,000 to 2,500 steps, but it depends on your height and stride. See the chart, the formula, and a free converter.
How many tiles do you need? Learn the simple area formula, how many tiles come in a box, how much extra to buy for waste, and use a free tile calculator to get the count.
Fun half birthday ideas for kids and adults, what a half birthday actually is, and how to find your half birthday date in seconds with a free calculator.
Learn how to measure the square footage of a room step by step, for rectangular, L-shaped, and round rooms, then convert to square meters and size flooring.
How much gravel do you need? Use the formula (length × width × depth ÷ 27), a coverage chart, and a free calculator to estimate cubic yards and tons fast.
How much does a fence cost? See typical price per linear foot by material, the factors that change it, DIY vs pro, and a calculator to size your materials.