The API Gateway Savings Plan Calculator estimates the monthly savings from moving an eligible portion of API gateway workload usage from an on-demand rate to a lower committed or negotiated rate. It keeps the eligible volume explicit so the comparison does not assume every unit qualifies for the discount.
The output shows baseline on-demand cost, committed-rate cost, monthly savings, and the effective savings percentage on the eligible workload. It can support commitment sizing discussions, but it does not model minimum-spend penalties, unused commitments, tier changes, or contract-specific terms unless you reflect them in the entered rates and volume.
1. Enter eligible usage
Use only the monthly gateway request volume you reasonably expect to qualify for the compared plan.
2. Enter both rates
Provide the on-demand and committed or negotiated unit prices on the same unit basis.
3. Add any fixed commitment fee
Include a recurring fee that is not already embedded in the committed unit rate.
4. Review savings
Compare the baseline, planned cost, dollar savings, and savings percentage.
On-demand cost = Eligible volume × On-demand unit rate Committed-plan cost = Eligible volume × Committed unit rate + Monthly commitment fee Monthly savings = On-demand cost − Committed-plan cost Savings rate = Monthly savings ÷ On-demand cost × 100
Eligible volume is measured in million requests. The model assumes the entered volume is fully covered by the compared rates for the month.
The main result is a planning metric for gateway request volume; use it with consistent units and scope when comparing scenarios.
Actual provider billing or operational limits can differ because of tiers, discounts, quotas, regions, architecture, and contract terms.
Given: 80,000 million requests, $0.08 on-demand, $0.055 committed, and no extra monthly fee.
Calculation: On-demand = 80,000 × $0.08 = $6,400. Committed = 80,000 × $0.055 = $4,400. Savings = $2,000. Savings rate = $2,000 ÷ $6,400 × 100 = 31.25%.
Result: The modeled monthly savings are $2,000, or 31.25% of the on-demand baseline.
The calculator will show negative savings, indicating the modeled plan costs more for the entered volume and fee.
Only if all of it can realistically receive the committed rate. Otherwise use the portion expected to be covered.
Not directly. If you expect unused commitment, represent that cost through the monthly commitment fee or reduce the eligible volume to a realistic covered amount.
A percentage savings cannot be meaningfully calculated when the on-demand baseline is zero. The dollar comparison can still be zero or negative depending on fees.
No. Provider plans can include minimums, term lengths, scope rules, and tier interactions that this simplified comparison does not reproduce.