Declared Usage Plan Cost Comparator

How to use Declared Usage Plan Cost Comparator

Apply a base charge plus marginal rates over strictly increasing tier boundaries. Each plan retains its exact usage breakdown, and comparisons use exact rational totals instead of rounded currency displays.

1. Enter model json (schema and units below).
2. Choose the stated convention and check the units and supported model.
3. Calculate, inspect the result, then copy or download it.

Good to know

• Plain decimal JSON numbers or strings, at most six fractional places, magnitude at most 1,000,000,000; raw numeric spellings and duplicate object members are checked. Exact rational arithmetic is capped at 8,192 bits. Text is at most 30,000 characters; a local JSON download preserves exact fractions or full stored approximate numbers. 1–20 plans, 1–30 tiers each; nonnegative usage/rates/base charges. Last upTo may be null for an unbounded tier. Graduated tiers only: no whole-volume repricing, tax, minimum charge, time-of-use, rounding rule or live tariff is inferred.
• Local calculation only; no input persistence or external lookup. Text/JSON is limited to 30000 characters and output to 1000000 characters. Numeric model inputs and precision/work limits are stated on this page. Approximate JSON numbers retain full stored values; exact arithmetic outputs retain decimal or fraction strings. Unsupported states fail explicitly.
• Educational user-assumption arithmetic only. No live prices, laws, tax rules, quotes or financial advice.