Math & Numbers

Convert liters to US liquid gallons with configurable decimal precision

Math & Numbers

Two-phase simplex for 2–6 variables and 1–8 ≤/≥/= constraints: Bland's rule, per-iteration pivot log, optimal/unbounded/infeasible status, and substitution checks.

Math & Numbers

Table lookup of L{f(t)} for 14 standard pairs, with parameter substitution, region of convergence, derivation note, and optional numeric F(s₀) evaluation.

Date & Time

IERS leap-second history (27 insertions since 1972), current TAI-UTC offset (+37 s), DUT1 (UT1-UTC) notes, and POSIX/NTP/GPS/TAI/UT1 cross-system conversion for a given UTC instant

Math & Numbers

Convert kinematic viscosity (ν = dynamic viscosity / density) between m²/s (square metres per second, SI base), cSt (centistokes, 1 cSt = 1e-6 m²/s = 1 mm²/s), and ft²/s (square feet per second, 1 = 0.09290304 m²/s). Converts via m²/s to the target unit and also lists the equivalent value in all three units for reference. Reference values: water 20°C ≈ 1.004 cSt, SAE 30 oil ≈ 300–400 cSt at 40°C.

Math & Numbers

Calculate the mechanical advantage of a lever and its output force. MA = L_in / L_out, and by moment balance F_out = F_in · MA. MA > 1 saves force; MA < 1 saves distance.

Math & Numbers

Compute kinetic energy, mass, or velocity from the other two, with momentum and km/h conversion

Math & Numbers

Compute the current-limiting resistor for LEDs in series with power, nearest standard value and wattage rating

Math & Numbers

Convert kilometers per liter to miles per gallon with configurable decimal precision

Math & Numbers

Convert liters per 100 kilometers to miles per gallon with configurable decimal precision

Math & Numbers

Convert kilopascals to standard atmospheres with configurable decimal precision

Math & Numbers

Convert kilopascals to bar with configurable decimal precision