Guides
Longer explanations for the decisions the calculators only hint at. Each one links back to the tool it supports.
Guides
7- The four deductions on an Azerbaijani payslip: same gross, two different netsIncome tax, DSMF, unemployment insurance and mandatory medical insurance — the two sector regimes, the kinks at 200 and 8,000, the reverse direction, and what the position really costs the employer.2026-09-04
- Bags or a truck: where a concrete order comes up shortVolume is the face times a depth quoted in another unit, the waste allowance goes in before the rounding, and a bag is a yield rather than a weight.2026-09-04
- What a strength meter can and cannot tell youEntropy is a property of how a password was generated, not of the string on screen — and what a meter can still usefully catch.2026-09-04
- Roof area is not the footprintA pitched roof carries more covering than the ground it stands on. The slope factor is the whole correction, and the eave overhang widens only two of the four sides.2026-09-04
- Why a tile order comes out shortYou cannot buy part of a tile, and you do not buy tiles at all — you buy boxes. Where the money goes between the measurement and the till.2026-09-04
- What an overpayment buysAn extra payment is worth the interest it cancels, and that depends on when it lands: 200 against this loan removes 1,190.83 at the start and 76.56 near the end.2026-09-04
- Five stair mistakes that only show up after the concrete is pouredThe measurement errors that make a stair fail inspection — and why almost all of them trace back to measuring the wrong two surfaces.2026-08-12