RES Calci

RES Tools – Dew-Point & Spring Calculator
RES Tools brings two essential mechanical-and-process calculations to your pocket:

Dew-Point ⇄ ppm H₂O

Convert dew-point temperature (°C) to water-vapour concentration in ppm(v) at any pressure in bar—or reverse-convert ppm back to dew point.

Uses the industry-standard Magnus–Tetens equation (–45 °C … +60 °C).

Coil-Spring Rate / Force

Enter wire Ø, inner Ø, active coils, shear modulus, free length, and desired working deflection.

Instantly see spring constant k (N/m), working force, max force at solid height, pitch, free length, solid length, and all fabrication parameters.

Automatic feasibility check warns if pitch or free length are impossible.

Why you’ll like it
100 % offline – all maths runs on your device; no sign-up, no data collection.

Ad-free & lightweight – under 3 MB install size.

Dark Material UI – clear cyan accents for quick reading in the workshop or lab.

Metric first – uses SI units throughout, with kilogram-force shown beside Newtons for quick intuition.

Made by engineers, for engineers – perfect for process, mechanical, HVAC, and maintenance work.

Data safety
RES Tools collects no personal data, uses no analytics SDKs, and requests zero dangerous permissions. See the in-app Privacy Policy for details.

Contact & support
Need another calculator or found a bug?
Email Pranay Kiran → [email protected]

Renewable Energy Systems Limited © 2025