{"success":true,"version":"v1","request":{"tool":"get_calculator_schema","calculator_id":"tip"},"result":{"entity_type":"calculator","id":"tip","calculator_id":"tip","canonical_url":"https://tttkmbb.com/finance/tip","name":"Tip Calculator","title":"Tip Calculator – Tip Amount, Total and Per-Person Share of a Bill","category":"finance","category_name":"Finance","tool_name":"calculate_tip","featured_mcp_tool":true,"description":"Computes the tip from a bill amount and tip percentage, the total including tip, and the per-person share when the bill is split evenly.","use_when":"You need to add a gratuity to a restaurant, delivery or service bill and optionally divide the total among several people.","do_not_use_when":"People pay for different items or unequal shares (use bill-split), or you need to add sales tax rather than a tip (use sales-tax).","inputs":[{"name":"bill_amount","label":"Bill amount","type":"number","required":true,"min":0,"max":10000000,"description":"Amount on the bill before tip (pre- or post-tax, as you prefer to tip).","example":85.5},{"name":"tip_percent","label":"Tip percentage","type":"number","unit":"%","required":false,"default":15,"min":0,"max":100,"description":"Gratuity as a percent of bill_amount. US restaurant custom is 15–20 %.","example":18},{"name":"split_between","label":"Number of people","type":"integer","required":false,"default":1,"min":1,"max":1000,"description":"How many people share the bill equally.","example":3}],"outputs":[{"name":"tip_amount","label":"Tip","type":"number","decimals":2,"description":"bill_amount × tip_percent / 100."},{"name":"total_amount","label":"Total with tip","type":"number","decimals":2,"description":"bill_amount + tip_amount."},{"name":"total_per_person","label":"Total per person","type":"number","decimals":2,"description":"total_amount / split_between."},{"name":"tip_per_person","label":"Tip per person","type":"number","decimals":2,"description":"tip_amount / split_between."},{"name":"bill_per_person","label":"Bill per person (before tip)","type":"number","decimals":2,"description":"bill_amount / split_between."}],"input_schema":{"type":"object","properties":{"bill_amount":{"description":"Amount on the bill before tip (pre- or post-tax, as you prefer to tip).","type":"number","minimum":0,"maximum":10000000,"examples":[85.5]},"tip_percent":{"description":"Gratuity as a percent of bill_amount. US restaurant custom is 15–20 %. Unit: %.","type":"number","minimum":0,"maximum":100,"default":15,"examples":[18],"x-unit":"%"},"split_between":{"description":"How many people share the bill equally.","type":"integer","minimum":1,"maximum":1000,"default":1,"examples":[3]}},"additionalProperties":false,"required":["bill_amount"]},"output_schema":{"type":"object","properties":{"tip_amount":{"description":"bill_amount × tip_percent / 100.","type":"number"},"total_amount":{"description":"bill_amount + tip_amount.","type":"number"},"total_per_person":{"description":"total_amount / split_between.","type":"number"},"tip_per_person":{"description":"tip_amount / split_between.","type":"number"},"bill_per_person":{"description":"bill_amount / split_between.","type":"number"}}},"formula":"tip_amount = bill_amount × tip_percent / 100; total_amount = bill_amount + tip_amount; per person = value / split_between","sources":[{"name":"Wikipedia – Gratuity (tipping customs by country)","url":"https://en.wikipedia.org/wiki/Gratuity","type":"reference","retrieved_at":"2026-09-23"},{"name":"Wikipedia – Percentage","url":"https://en.wikipedia.org/wiki/Percentage","type":"reference","retrieved_at":"2026-09-23"}],"freshness":{"type":"static","max_age_seconds":null,"note":"Deterministic formula with fixed constants; results never go stale. Inputs supplied by the caller determine the output."},"examples":[{"name":"85.50 bill, 18 % tip, 3 people","inputs":{"bill_amount":85.5,"tip_percent":18,"split_between":3},"expected":{"tip_amount":15.39,"total_amount":100.89,"total_per_person":33.63,"tip_per_person":5.13,"bill_per_person":28.5},"url":"https://tttkmbb.com/api/v1/calculate/tip?bill_amount=85.5&tip_percent=18&split_between=3"},{"name":"42.00 bill, 20 % tip","inputs":{"bill_amount":42,"tip_percent":20},"expected":{"tip_amount":8.4,"total_amount":50.4,"total_per_person":50.4},"url":"https://tttkmbb.com/api/v1/calculate/tip?bill_amount=42&tip_percent=20"}],"faq":[{"q":"Should I tip on the pre-tax or post-tax amount?","a":"Custom in the US is to tip on the pre-tax subtotal, though many people tip on the total; enter whichever amount you want the percentage applied to."},{"q":"What are typical percentages?","a":"US sit-down restaurants 15–20 %, exceptional service 20–25 %, counter service 0–10 %. In many countries (Japan, much of Europe) service is included and tipping is small or absent."}],"tags":["tip calculator","gratuity","split the bill","restaurant tip","how much to tip"],"related":[{"calculator_id":"bill-split","reason":"Divide a bill unevenly or itemise it among people."},{"calculator_id":"sales-tax","reason":"Add sales tax to a price."}],"links":{"html":"https://tttkmbb.com/finance/tip","markdown":"https://tttkmbb.com/finance/tip.md","json":"https://tttkmbb.com/finance/tip.json","api":"https://tttkmbb.com/api/v1/calculate/tip","schema":"https://tttkmbb.com/api/v1/calculators/tip","openapi":"https://tttkmbb.com/openapi.json","mcp":"https://tttkmbb.com/mcp"},"version":"v1","updated_at":"2026-09-23"},"timestamp":"2026-09-23T23:23:05Z"}