Practical guides, how-tos and comparisons to get the most out of our free online tools.
120 units sold out of 400 received is 30 %. Whether that is a success depends entirely on how long it took, and the rate on its own does not carry the answer.
Camille Laurent · 3 min read
Opening stock 40,000, purchases 120,000, closing stock 35,000 — the cost of goods sold is 125,000, and it is larger than the purchases because the shelf gave up 5,000 of what was already there.
Camille Laurent · 3 min read
A gap of 1,800 is a shrinkage rate of 3.6 %. The percentage is the number that travels; the absolute figure is the one that pays for the fix.
Camille Laurent · 3 min read
Selling 100 a day with a ten-day lead time and 300 units of safety stock, you reorder at 1,300 — not because 1,300 is a comfortable level, but because that is what ten days of selling costs.
Camille Laurent · 3 min read
Going from a 95 % service level to 99 % raises the z-score from 1.645 to 2.326 and the safety stock from 346 units to 488. The last few points of availability are the expensive ones.
Lena Hoffmann · 3 min read
Buy and sell fees of 0.5 % each need a 1.005 % gain to break even. Triple them to 1.5 % and you need 3.046 % — more than triple, because the two fees multiply rather than add.
Camille Laurent · 3 min read
CAPM and the dividend growth model both compute the cost of equity. On one set of inputs they give 9 % and 7 % — and the choice between them decides a valuation more than any figure inside either.
Camille Laurent · 3 min read
A payment of 1,000 a year is worth 20,000 at a 5 % discount rate and 25,000 at 4 %. The formula is a single division, and that is exactly why the input matters more than the arithmetic.
Camille Laurent · 3 min read
Ten shares at 100 plus twenty at 80 gives an average of 86.67. Buy forty at 50 instead and it falls to 60 — but the money at risk goes from 2,600 to 3,000.
Camille Laurent · 3 min read
A 34-inch bust is a US 6, a UK 10, a German 36, a French 38 and an Italian 42. Five labels, one body — while a men's shirt collar prints the neck measurement itself.
Sofia Nunes · 4 min read
Boiling point follows air pressure, so it falls about one degree Fahrenheit every 550 feet. In Mexico City water boils at 198 °F, in Denver at 202 °F, and on Everest at 157 °F — which is why altitude changes cooking times.
Lena Hoffmann · 4 min read
A4 and US Letter differ by 5.9 mm one way and 17.6 mm the other, so "fit to page" scales the whole document to 94 %. Ten-point type becomes 9.4, and a plan drawn to scale is wrong by six per cent.
Marco Bianchi · 4 min read