Continue your engineering work when you need it - without a subscription.
Choose a one-time calculation package and use the complete LEDLITY Toroidal Inductor Calculator. Purchased calculations remain available in your account until used.
New to LEDLITY? Every new account includes 3 free engineering calculations.
ESTA — 20 Engineering Calculations
€12
EUR 0.60 per calculation
For occasional engineering work and individual design projects.
One-time purchase | No subscription
Recommended
ESTA — 50 Engineering Calculations
€25
EUR 0.50 per calculation
For regular design work and evaluation of multiple inductor configurations.
One-time purchase | No subscription
ESTA — 100 Engineering Calculations
€40
EUR 0.40 per calculation
For frequent engineering use and repeated design evaluation.
One-time purchase | No subscription
Every package includes the complete engineering workflow
The package determines only how many calculations are available to your account. It does not limit the engineering capabilities of the calculator.
- Core and wire selection
- DC-bias evaluation
- Flux-density checks
- Winding feasibility
- Copper and core-loss estimation
- Thermal evaluation
What counts as one calculation?
One calculation is used when a new set of design inputs is processed and stored as a project. Reopening an identical saved request, viewing previous results or exporting a project does not use another calculation. Changing any input and running the calculator again creates a new calculation. A completed result may either pass or fail the selected engineering limits; both count as one calculation.
Frequently asked questions
Do I need a subscription?
No. Calculation packages are one-time purchases with no recurring charges.
Do purchased calculations expire?
No. Purchased calculations remain available in your LEDLITY account until used.
Are calculator features different between packages?
No. Every package provides access to the same engineering calculation workflow. Packages differ only in the number of calculations.
Can I request a refund?
Yes. Eligible purchases are covered by our 30-day money-back guarantee, subject to the conditions in our Return and Refund Policy.