Free IP Calculator
Subnet and CIDR calculator — work out network, broadcast, host range, and mask from any address.
A free, browser-based tool from our library of 54+ free Ed Tools — built for our own classrooms and shared with Singapore trainers and educators.
About IP Calculator
Subnet and CIDR calculator — work out network, broadcast, host range, and mask from any address.
Key features
- CIDR ↔ subnet-mask conversion
- Network / broadcast / host-range output
- Subnetting practice mode
Built with
Who uses IP Calculator?
Singapore training providers, WSQ ATOs, corporate L&D teams, and educational institutes use IP Calculator inside our AI-LMS-TMS and e-learning deployments. Whether you need a single tool integrated into your existing classroom workflow or the full 54-tool suite, we scope, deploy, and train your organisation end-to-end.
IP Calculator — frequently asked questions
Is IP Calculator free to use?
Yes. IP Calculator is completely free and runs in your browser — there is no signup, licence fee, or trial limit. Tertiary Infotech Academy built it for our own networking sessions and made it openly available to trainers and educators.
Do I need to install anything to use IP Calculator?
No. IP Calculator is a browser-based tool — just open the live demo on any modern device. Learners can usually join from a single link with no accounts required.
Can I use IP Calculator inside my own LMS or training programme?
Yes. We can brand, integrate, and deploy IP Calculator — or the full suite of 54+ Ed Tools — inside your own Learning / Training Management System with WSQ/TPQA-compliant workflows. Enquire using the form and a consultant will reply within one business day.
Is the source code for IP Calculator available?
Yes. IP Calculator is open-source — you can view the code on GitHub at github.com/alfredang/ipcalculator.
Want IP Calculator branded inside your own LMS?
The tool is free to use as-is. To bundle, brand, or custom-build it into your training platform, tell us what you need — we reply within one business day.
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Bring IP Calculator and 54+ Ed Tools into your own LMS / TMS
WSQ/TPQA-compliant workflows, SSG API integration, Singapore data residency, and your learner data migrated — scoped at a fixed fee with a typical four-week go-live.