Practical guides, how-tos and comparisons to get the most out of our free online tools.
409 complete stays measured between 1966 and 2026: the shortest lasted 8 days, the longest 236, and the average 53. A factor of thirty, and retrograde loops explain all of it.
Antonio Delgado · 4 min read
With a 0.6 % base rate, a soft pity at 74 and a hard pity at 90, the effective chance climbs from 0.6 % to 36.6 % by pull 80 and 90.6 % by pull 89. Without pity, ninety pulls would give 41.8 %.
Lena Hoffmann · 4 min read
Whitespace is the whole reason these tools exist. A row of blanks looks empty, is not empty to a strict test, and quietly survives every filter you apply after it.
Daniel Okonkwo · 4 min read
Twelve monthly reports can become twelve tabs or one table of twelve months. Only the second can be sorted and summed in one go — and it is the one where the header rows need handling.
Daniel Okonkwo · 4 min read
Measured over 10,248 dates from 1966 to 2026: retrograde 19.2 % of the time, and never more than 27.8° from the Sun — which leaves your Mercury sign only three possible values.
Antonio Delgado · 3 min read
To fire at 25 cm with 12 per cent shrinkage you throw at 28.41 cm, not 28. Adding the percentage instead of dividing by its complement leaves you 3.6 mm short — every time, in the same direction.
Antonio Delgado · 5 min read
The trade rule of 0.8 oz of wax per fluid ounce of jar is an effective density of 0.767 g/mL — calibrated for soy at an 85 per cent fill. It is right to within 0.2 per cent for soy and under-reads beeswax by six.
Antonio Delgado · 5 min read
A thousand grams of olive oil needs 127 g of lye; the same thousand grams of a palm-coconut-olive blend needs 143. Saponification is stoichiometry, not a rule of thumb, and a five per cent error in one direction makes a caustic bar.
Antonio Delgado · 5 min read
The classic two-gene predictor is arithmetic, not a draw — and its one confident answer, blue × blue giving 100 % blue, is exactly where real genetics disagrees with it.
Antonio Delgado · 4 min read
Course timetables, match fixtures, shift rotas and conference programmes all start life as a table. Four columns are enough to turn one into a file every calendar application can import.
Daniel Okonkwo · 4 min read
A 150 × 200 cm quilt has a 725 cm perimeter once you allow for the join, which is seven strips off a 110 cm bolt and six off a 140 cm one. The strip width you choose sets the fabric, and the corners set whether it lies flat.
Antonio Delgado · 6 min read
Twelve pieces of 46 cm take 1.84 m on a 140 cm bolt. Make them 47 cm and it jumps to 2.82 m — fifty-three per cent more fabric for one centimetre, because the third piece no longer fits across.
Lena Hoffmann · 5 min read
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