# Electrical engineering tools

Choose a calculator, compare equipment, prepare a project or inspect the complete API tool reference.

- [Transformer sizing calculator](https://voltformer.com/sizing-tool): Estimate transformer kVA from connected load, power factor, diversity and growth reserve.
- [Transformer loss and payback calculator](https://voltformer.com/roi-calculator): Compare energy losses, annual operating cost and optional simple payback for two transformer designs.
- [Country grid compatibility checker](https://voltformer.com/grid-standards): Screen transformer electrical parameters against preliminary country grid references.
- [Electricity price comparison](https://voltformer.com/electricity-prices): Electricity price references with source periods, consumer scope, tax treatment and separate fixed charges. Verified tariffs and averages are distinguished from unverified legacy records.
- [Raw materials and escalation tools](https://voltformer.com/raw-materials): Monthly copper, aluminium, CRGO and mineral insulating oil references. Dielectric fluid scenarios are identified separately; fluid escalation requires dated supplier quotes.

[API tool reference](https://voltformer.com/tool-reference.md)