---
title: "Leverage Ratio Calculator"
method: POST
path: "/v1/tools/leverage_ratio_calculator"
tags: ["leverage-ratio", "tier-1", "bcbs-270", "bcbs-360", "basel-iii", "pillar-3", "km1", "g-sib", "capital", "regulatory"]
---

# Leverage Ratio Calculator

`POST /v1/tools/leverage_ratio_calculator`

## Request

- Base URL: `https://ainumbers.co`
- URL: `https://ainumbers.co/v1/tools/leverage_ratio_calculator`
- Auth: none declared

Basel III leverage ratio per BCBS 270 (January 2014) as revised by BCBS 360 (December 2017). Leverage Ratio = Tier 1 Capital ÷ Total Exposure Measure ≥ 3% (G-SIB leverage buffer up to 1.75% additional). Covers on-balance-sheet, derivative (SA-CCR), SFT, and off-balance-sheet exposures. Feeds Pillar 3 KM1 (T472). Tier 1 Policy Mandate JSON + Markdown. Client-side. Works offline. Zero PII.

**Tool URL:** https://ainumbers.co/tools/471-leverage-ratio-calculator.html
**AP2/Policy Mandate export:** yes

## Request body

- object
  - `cet1` number, required: CET1 capital (m)
  - `at1` number: Additional Tier 1 capital (m); defaults to 0
  - `gsib_bucket` 0 | 1 | 1.5 | 2 | 2.5 | 3.5: G-SIB surcharge bucket; 0 = not G-SIB
  - `obs_exp` number, required: On-balance-sheet gross exposures (m)
  - `deriv_exp` number: Derivative exposure measure (SA-CCR RC+PFE, m)
  - `sft_exp` number: SFT exposure measure (m)
  - `offbs_exp` number: Off-balance-sheet CCF-adjusted exposures (m)
  - `other_exp` number: Other adjustments (m)

## Response `200`

Successful tool execution result

- object
  - `tier1_m` number
  - `total_exposure_m` number
  - `leverage_ratio_pct` number
  - `min_lr_pct` number
  - `compliant` boolean

---

[API](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite.md) · [All operations](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/llms.txt) · [OpenAPI document](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/revisions/b462e4f5bb28?raw)