Fuel Viscosity Temperature Calculator

Calculate the required fuel pre-heating temperature to achieve the target viscosity at the main engine inlet using Walther-ASTM principles.

Fuel Properties Input

Known Viscosity (ν1)cSt (Centistokes)

At Temperature (T1)°C

Walther 'k' ConstantDefault: 0.7

Calculation Method for 'B' Constant

Use Standard/Manual 'B' Constant

Calculate 'B' from Two Known Viscosity Points

Walther 'B' ConstantDefault: 3.8

Engine Requirement

Target Viscosity at Engine Inlet (ν_target)cSt

**Disclaimer:** This calculator uses the Walther-ASTM equation principles: log(log(ν+k)) = A - B log(T_abs). The constant 'k' (typically 0.6-0.8 for fuel oils) and 'B' (slope) are critical. Accuracy depends heavily on correct input values and fuel characteristics. Always cross-verify with official purifier/heater manuals and viscosity control system readings. This tool is for estimation and educational purposes.

Ensure viscosity values (ν) are such that (ν+k) > 1 for valid log-log calculations.