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LUBESOLUT
Technical calculators · free to use

Technical Tools
Lubricant Engineering

Free technical calculators based on ASTM, ISO and AGMA standards for selection, analysis and comparison of industrial lubricants. No registration, no limits, instant results.

11

calculators available

ASTM D341

main standard

100%

free · no registration

ISO · SAE · AGMA

systems supported

ASTM D341

Oil Blending

Calculate the resulting viscosity when blending two oils in a given ratio, or determine the ratio needed to reach a target viscosity.

Oil 1 viscosity (cSt)Oil 2 viscosity (cSt)Blend % / target viscosity
Resulting viscosity + ISO VG grade
ASTM D341

Operational Viscosity

Predict an oil's viscosity at any working temperature knowing its viscosity at two reference temperatures (typically 40 °C and 100 °C).

ν at T₁ (cSt)ν at T₂ (cSt)Operating temperature (°C)
Viscosity in cSt at operating temperature
ASTM D2270

Viscosity Index

Calculate the third of the three viscosity parameters (ν40, ν100, VI) when the other two are known. Key for evaluating a lubricant's thermal stability.

2 of 3 values: ν40, ν100, VI
Unknown parameter: ν40 · ν100 · or VI
AGMA 9005

Gearbox Viscosity

Determine the recommended viscosity grade for an industrial gearbox based on power, input speed and lubrication type.

Lubrication type (splash / circulation)Reduction typePower (HP/kW)Speed (RPM)
Recommended ISO VG + AGMA equivalent
ISO 3448 · SAE J300

SAE / ISO / AGMA Equivalences

Correlation table between the most widely used viscosity classification systems in industry: ISO VG, AGMA, SAE Motor, SAE Gear and Saybolt (SUS).

Look up any grade in any system
Equivalences in all classification systems
API / ASTM D287

API Gravity

Convert between the four density systems for petroleum products: API gravity, specific gravity (SG), kg/litre and pounds/gallon. Reference at 15.6 °C (60 °F).

One value in any of the 4 systems
Equivalences in API · SG · kg/L · lb/gal
ASTM D341

Plot T-ν Curve

Generate and visually compare the viscosity-temperature curves of up to 4 different oils. Ideal for selecting the right lubricant for a given temperature range.

Up to 4 oils: name + ν40 + ν100
Interactive SVG chart + value table
Conversion

Unit Conversion

Convert viscosity between all systems currently in use: cSt (kinematic), mPa·s (dynamic), SUS (Saybolt Universal), Engler and Redwood.

Value in any viscosity unit
Equivalences in cSt · mPa·s · SUS · Engler · Redwood
Temperature

°C ↔ °F — Temperature

Convert between Celsius, Fahrenheit, Kelvin and Rankine. Includes reference temperatures for industrial lubrication: drop points, operating and storage limits.

°C or °F (bidirectional)
°C · °F · K · °R + reference table
Geometry

Hose Fluid Capacity

Calculate the fluid volume contained in a hose or pipe from its inner diameter and length. Useful for estimating first fill, bleeding and system weight.

Inner diameter (mm / inches)Length (m / ft)Fluid density
Volume in mL · L · gal · in³ + fluid weight
ISO 3448 · SAE · AGMA

Viscosity Table

Complete reference of 18 ISO VG grades with viscosity ranges at 40 °C and 100 °C, AGMA, SAE Motor, SAE Gear, Saybolt (SUS) equivalences and typical applications.

Look up or filter by classification system
ν40 (min/nom/max) · ν100 · AGMA · SAE Motor · SAE Gear · SUS

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