Physical constants
The CODATA 2018 values, from the speed of light and the Planck constant to the molar gas constant, with the ones fixed exactly by the SI marked as exact.
TOOL 03 / REFERENCE
The back of the textbook, one click from your calculation.
Physical constants, the periodic table, material data, steam and property tables, and section properties. Click a value to copy it, or send it to the calculator with its units.
No account required · Right in your browser · Works offline once opened
SLIDE RULE / ReferenceSCREENSHOT
WHAT IT DOES
Look it up, then use it.
Every value here can go straight into a calculation, so nothing is retyped and no digit is dropped on the way.
Periodic table
All 118 elements. Choose one for its atomic mass, electron configuration, electronegativity, density, melting and boiling points and oxidation states.
Material data
Thermal, mechanical, electrical and optical properties of common engineering materials, plus fluids, gases and phase changes: Young’s modulus and yield strength of A36 steel, the conductivity of copper, the viscosity of glycerol.
Steam and property tables
Saturated water by temperature and by pressure, superheated steam, air at 1 atm, liquid water and saturated R-134a. Type a temperature or pressure and every column is interpolated between the two nearest rows.
Section properties
Enter the dimensions of a rectangle, tube, I-section, T-section, channel, angle and more for its area, centroid, second moments of area, section moduli and radii of gyration.
Search across all of it
Type “copper”, “steam” or “I-section” and go to the row. A value you click can be copied, added to a worksheet, or used in the calculator with its units attached.
WHAT IS IN IT
Sixteen data sets, kept together.
The tables that thermodynamics, heat transfer, materials and mechanics courses ask you to read from, in one place and in consistent units.
Material values are typical figures from standard references (the CRC Handbook, NIST, Çengel & Ghajar, ASM and MatWeb). Real values vary with grade, temper, purity and temperature, so check a datasheet for design work.
GENERAL
- Physical constants
- Periodic table
MATERIAL DATA
- Thermal properties
- Phase changes
- Mechanical properties
- Fluids
- Gases
- Electrical
- Optical
PROPERTY TABLES
- Saturated water, by temperature
- Saturated water, by pressure
- Superheated steam
- Air at 1 atm
- Liquid water
- R-134a, saturated
GEOMETRY
- Section properties10 shapes
FOR EXAMPLE
The kind of thing you came for.
A few of the values in the tables, as they appear there.
- YOU WANTTHE TABLE HASWHERE
Molar gas constant, R8.314462618 J/(mol·K)Physical constants.Young’s modulus of structural steel200 GPaMechanical properties, ASTM A36, with a yield strength of 250 MPa.Thermal conductivity of copper401 W/(m·K)Thermal properties, pure copper near 25 °C.Density of water998.2 kg/m³Fluids, at 20 °C and 1 atm.Resistivity of copper1.68 × 10⁻⁸ Ω·mElectrical, at 20 °C.Second moment of area, 100 × 200 mm rectangle6.6667 × 10⁷ mm⁴Section properties, about the horizontal axis through the centroid.
QUESTIONS
Before you open it.
Can I interpolate in the steam tables?
Yes. Each property table has a Look up box: type a temperature or a pressure and every column is interpolated in a straight line between the two nearest rows.
Where do the values come from?
Constants are the CODATA 2018 recommended values. Material and property data are typical figures from standard references, named under each table.
How do I use a value in a calculation?
Click it, then choose Use in calculator or Add to worksheet. It arrives with its units, so the calculator can convert it for you.
Is it free?
Yes. All of the reference data is part of the free plan, with no account needed.
One of eight tools that work together.
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