Practical guides, how-tos and comparisons to get the most out of our free online tools.
One method targets the highest interest rate, the other the smallest balance. On a realistic set of debts the gap is smaller than most people expect — here is the calculation.
Camille Laurent · 4 min read
One stick of US butter equals ½ cup, 8 tablespoons and 113 g. The full conversion table for sticks, cups, tablespoons and grams.
Marco Bianchi · 3 min read
Running costs roughly 0.73 kcal per pound per mile — one kilocalorie per kilogram per kilometre in the units the physiology is published in — and, this is the counterintuitive part, the figure barely moves with pace. Here is the derivation from the ACSM equation, the corrections that matter, and why grade changes it far more than speed.
Sofia Nunes · 13 min read
Mining profit is daily revenue minus daily power cost, and the electricity price decides it. Here is the calculation, a break-even table, and the three variables that move against you.
Camille Laurent · 6 min read
Rates differ by country, the mechanics rarely do: a disposal triggers a gain, the gain is proceeds minus cost basis, and staking is income. Here is the calculation and where jurisdictions diverge.
Camille Laurent · 7 min read
Blood alcohol content measures the concentration of alcohol in your blood. Learn how BAC is estimated with the Widmark formula and why legal limits differ by country.
Sofia Nunes · 3 min read
Ethanol carries 7 kcal per gram and the arithmetic is exact: volume × ABV × 0.789 × 7. A dry spirit is almost pure alcohol calories; a liqueur is nearly half sugar. Here is the derivation, the table, and the metabolic caveat stated without overclaiming.
Sofia Nunes · 12 min read
Use the vehicle placard pressure, not the number on the tire. Learn why the sidewall figure is a maximum, why pressure is set cold, and how temperature moves it.
Marco Bianchi · 4 min read
Work out how much topsoil to order from your area and depth — volume in cubic yards, plus the weight in tons so your delivery arrives right.
Marco Bianchi · 4 min read
A generator solves a constrained arithmetic problem — hit an energy target, hit the macro splits, stay inside a food list — and it does that well. Here is the arithmetic that makes a plan work, and the honest list of what no generator can see.
Sofia Nunes · 13 min read
The rule caps the loss, not the position. Here is the formula, a worked example, and what a run of ten losses costs at 1 percent versus 2 percent.
Camille Laurent · 4 min read
10,000 steps works out to roughly 4 to 5 miles for most people. Learn how stride length turns steps into distance, and how many calories the walk burns.
Aisha Karim · 3 min read