# Tonelva > Blood pressure reference material and five free browser calculators, published by > Vast Flow, LLP alongside the Tonelva blood pressure diary app. Every classification > is returned under BOTH the 2017 ACC/AHA and the 2018 ESC/ESH thresholds, because the > two genuinely disagree about where high blood pressure begins. > Tonelva records readings from a cuff. It does not measure blood pressure, and no > phone can. Nothing here is medical advice, a diagnosis or a personal target. > Every page below is also available as markdown: append `index.md` to the URL, or send > `Accept: text/markdown`. Full text of the tools and the reference pages in one file: > https://tonelva.com/llms-full.txt ## Free tools - [7-Day Blood Pressure Average Calculator | Tonelva](https://tonelva.com/tools/blood-pressure-average-calculator/): Average a week of home readings the way the guidelines ask, including discarding the first day, with morning and evening reported separately. - [Blood Pressure Category Checker — Both Scales | Tonelva](https://tonelva.com/tools/blood-pressure-category-checker/): Enter a reading and see how the American ACC/AHA and the European ESC/ESH guidelines each classify it, side by side, with the disagreement explained. - [Mean Arterial Pressure Calculator (MAP) | Tonelva](https://tonelva.com/tools/mean-arterial-pressure-calculator/): Calculate mean arterial pressure from a blood pressure reading, see the arithmetic worked through, and understand what a home MAP figure can and cannot tell you. - [Printable Blood Pressure Log — Large Print, Free | Tonelva](https://tonelva.com/tools/printable-blood-pressure-log/): Generate a large-type blood pressure log sheet with dates filled in and the measurement conditions in the header, then print it. Free, nothing to sign up for. - [Pulse Pressure Calculator — Wide, Narrow or Usual | Tonelva](https://tonelva.com/tools/pulse-pressure-calculator/): Work out your pulse pressure from a blood pressure reading and understand what a wide or narrow gap indicates, with the age effect explained honestly. ## Blood pressure reference - [ESC/ESH Blood Pressure Guidelines: US vs Europe | Tonelva](https://tonelva.com/vitals/aha-vs-esc-blood-pressure-guidelines/): Compare ACC/AHA and ESC/ESH blood pressure thresholds, understand home readings, and see why the same number can receive different labels. - [Blood pressure app: what it can and cannot do | Tonelva](https://tonelva.com/vitals/blood-pressure-apps/): A blood pressure app cannot measure you. Learn how to choose one that records cuff readings, protects privacy, and creates a useful history. - [Blood pressure by age chart: what it misses | Tonelva](https://tonelva.com/vitals/blood-pressure-by-age/): Blood pressure by age chart explained: compare American and European categories, understand aging arteries, and track readings your clinician can use. - [Blood pressure chart: American and European categories | Tonelva](https://tonelva.com/vitals/blood-pressure-chart/): Compare American ACC/AHA and European ESC/ESH blood pressure categories, understand systolic and diastolic readings, and keep a useful home log for your appointment. - [Why Is My Blood Pressure Different in Each Arm? | Tonelva](https://tonelva.com/vitals/blood-pressure-different-in-each-arm/): Blood pressure can differ between arms. Learn what 10, 15, and 20 mmHg gaps may mean, how to compare readings, and which arm to use. - [Blood pressure log for doctor visits: make it useful | Tonelva](https://tonelva.com/vitals/blood-pressure-log-for-your-doctor/): A blood pressure log for an appointment should show averages, timing, arm, cuff, and conditions. Learn how to organize readings clearly for review. - [Home Blood Pressure Monitoring Protocol: 7-Day Method | Tonelva](https://tonelva.com/vitals/home-blood-pressure-monitoring/): Use a seven-day home blood pressure monitoring protocol with 28 readings, a first-day discard, proper cuff technique, and a meaningful average. - [How to Measure Blood Pressure at Home Correctly | Tonelva](https://tonelva.com/vitals/how-to-measure-blood-pressure-at-home/): Learn how to measure blood pressure at home with the right cuff, posture, rest period and recording method so your readings show a useful pattern. - [Is 130/85 High Blood Pressure? Two Guideline Answers | Tonelva](https://tonelva.com/vitals/is-130-over-85-high/): A reading of 130/85 is stage 1 under US guidance but high-normal under European guidance. Learn how to repeat it and spot a meaningful pattern. - [Mean arterial pressure: formula and limits | Tonelva](https://tonelva.com/vitals/mean-arterial-pressure/): Mean arterial pressure explained: calculate MAP, interpret the estimate, compare U.S. and European blood-pressure categories, and use home readings wisely. - [Morning Blood Pressure Surge: How to Track It | Tonelva](https://tonelva.com/vitals/morning-blood-pressure-surge/): Learn why blood pressure can rise after waking, how to separate morning and evening readings, and which patterns need prompt medical attention. - [Pulse Pressure: Formula, Ranges, and Meaning | Tonelva](https://tonelva.com/vitals/pulse-pressure/): Learn how to calculate pulse pressure, compare American and European blood pressure categories, understand wide or narrow readings, and track useful home trends. - [What Throws Off a Blood Pressure Reading: 14 Causes | Tonelva](https://tonelva.com/vitals/what-throws-off-a-blood-pressure-reading/): Find out what throws off a blood pressure reading, including cuff fit, posture, caffeine, stress, and device problems, with steps for cleaner home readings. - [White Coat Hypertension: Clinic High, Home Normal | Tonelva](https://tonelva.com/vitals/white-coat-hypertension/): Learn how white coat and masked hypertension differ, how American and European categories compare, and how to collect reliable home readings without panic. ## Comparisons - [Tonelva vs Blood Pressure Log Feeltracker: Which Fits? | Tonelva](https://tonelva.com/compare/tonelva-vs-blood-pressure-log-feeltracker/): Tonelva vs Blood Pressure Log Feeltracker: compare camera entry, privacy, trends, reminders, standards, exports, and the best fit for your routine. - [Tonelva vs Blood Pressure Log, Heart Rate: Which Fits? | Tonelva](https://tonelva.com/compare/tonelva-vs-blood-pressure-log-heart-rate/): Tonelva and Blood Pressure Log, Heart Rate take different paths. Compare cuff logging, heart-rate tools, reminders, privacy, exports, and fit. - [Tonelva vs Blood Pressure Tracker SmartBP | Which fits? | Tonelva](https://tonelva.com/compare/tonelva-vs-blood-pressure-tracker-smartbp/): Tonelva vs Blood Pressure Tracker SmartBP: compare cuff logging, Apple Health, trends, reminders, privacy, and the workflow that fits your care. - [Tonelva vs Blood Pressure Tracker •: Which fits? | Tonelva](https://tonelva.com/compare/tonelva-vs-blood-pressure-tracker/): Tonelva and Blood Pressure Tracker • both log blood pressure. Compare their design, reports, reminders, health sync, and the best fit for your routine. - [Tonelva vs BP diary (self-monitoring): which fits? | Tonelva](https://tonelva.com/compare/tonelva-vs-bp-diary-self-monitoring/): Tonelva vs BP diary (self-monitoring): compare logging, trends, reminders, reports, privacy, and the design choice that best fits your routine. - [Tonelva vs OMRON connect US/CAN/EMEA: Which Fits? | Tonelva](https://tonelva.com/compare/tonelva-vs-omron-connect-us-can-emea/): Tonelva vs OMRON connect US/CAN/EMEA: compare device support, privacy, trends, reminders, reports, and the features that fit your routine. ## Machine surface - [Open data](https://tonelva.com/api/): the reference tables, the tool catalogue and what the app does, as keyless JSON under CC BY 4.0. - [OpenAPI 3.1](https://tonelva.com/api/v1/openapi.json) - [The calculation engine](https://tonelva.com/js/engine.js): the one ES module the browser tools, the endpoints and the MCP server all compute with. - MCP (JSON-RPC 2.0 over POST): https://tonelva.com/mcp - A2A: https://tonelva.com/a2a ## About - [About Tonelva — Who We Are and How We Work](https://tonelva.com/about/): Who builds the Tonelva blood pressure diary, why every page shows both the American and European scales, how we make money, and the rules we write under. - [Contact & Subscription Help | Tonelva](https://tonelva.com/contact/): One email address for everything, plus step-by-step instructions for cancelling a Tonelva subscription on iPhone or Android and requesting a refund. - [Privacy Policy | Tonelva](https://tonelva.com/privacy/): How the Tonelva blood pressure diary handles data: no account, no server, no transmitted readings, and what the camera pulse measurement does with every frame it receives. - [Terms of Use | Tonelva](https://tonelva.com/terms/): Terms for the Tonelva blood pressure diary and tonelva.com: what the app records, what the camera pulse measurement is and is not, subscriptions, cancellation and liability.