{"product_id":"useful-excel-calculator-basic-lev-maths","title":"Useful Excel Calculator - basic LEV Maths","description":"\u003ch3 data-start=\"316\" data-end=\"369\"\u003eA Practical Calculation Aid for LEV Practitioners\u003c\/h3\u003e\n\u003cp data-start=\"371\" data-end=\"521\"\u003eLEV calculations are a routine part of design, testing, and assessment — yet they’re also one of the most common sources of simple, repeatable errors.\u003c\/p\u003e\n\u003cp data-start=\"523\" data-end=\"664\"\u003eConverting between area, velocity, and volumetric flowrate.\u003cbr data-start=\"582\" data-end=\"585\"\u003eRearranging formulas on site.\u003cbr data-start=\"614\" data-end=\"617\"\u003eDouble-checking duct sizes under time pressure.\u003c\/p\u003e\n\u003cp data-start=\"666\" data-end=\"898\"\u003eThe \u003cstrong data-start=\"670\" data-end=\"706\"\u003eBasic LEV Maths Excel Calculator\u003c\/strong\u003e was created as a \u003cstrong data-start=\"724\" data-end=\"750\"\u003epractical support tool\u003c\/strong\u003e for LEV practitioners who want a quick, structured way to check calculations while keeping full ownership of the engineering judgement behind them.\u003c\/p\u003e\n\u003cp data-start=\"900\" data-end=\"1038\"\u003eThis is not a “black box” calculator — it’s a transparent, formula-based worksheet designed to mirror the maths used in everyday LEV work.\u003c\/p\u003e\n\u003chr data-start=\"1040\" data-end=\"1043\"\u003e\n\u003ch2 data-start=\"1045\" data-end=\"1089\"\u003eA Simple, Structured LEV Calculation Tool\u003c\/h2\u003e\n\u003cp data-start=\"1091\" data-end=\"1264\"\u003eThe calculator is laid out across \u003cstrong data-start=\"1125\" data-end=\"1155\"\u003efour clearly labelled tabs\u003c\/strong\u003e, each aligned with common LEV tasks encountered during design, inspection, and COSHH Regulation 9 TExT work.\u003c\/p\u003e\n\u003ch3 data-start=\"1266\" data-end=\"1293\"\u003eTab 1 – Basic LEV Maths\u003c\/h3\u003e\n\u003cp data-start=\"1294\" data-end=\"1444\"\u003eA reference tab covering core LEV mathematical relationships, helping reinforce understanding of how area, velocity, and volumetric flowrate interact.\u003c\/p\u003e\n\u003ch3 data-start=\"1446\" data-end=\"1486\"\u003eTab 2 – Find the Volumetric Flowrate\u003c\/h3\u003e\n\u003cp data-start=\"1487\" data-end=\"1651\"\u003eEnter duct or hood area and air velocity to calculate volumetric flowrate (Q).\u003cbr data-start=\"1565\" data-end=\"1568\"\u003eUseful for checking system balance, conservation of mass, and expected performance.\u003c\/p\u003e\n\u003ch3 data-start=\"1653\" data-end=\"1708\"\u003eTab 3 – Find the Duct Size from Volumetric Flowrate\u003c\/h3\u003e\n\u003cp data-start=\"1709\" data-end=\"1852\"\u003eCalculate duct diameter from a known volumetric flowrate.\u003cbr data-start=\"1766\" data-end=\"1769\"\u003eParticularly useful when reviewing design intent, modifications, or legacy systems.\u003c\/p\u003e\n\u003ch3 data-start=\"1854\" data-end=\"1912\"\u003eTab 4 – Find the Duct Size from Hood Area and Velocity\u003c\/h3\u003e\n\u003cp data-start=\"1913\" data-end=\"2045\"\u003eWork backwards from hood requirements to establish appropriate duct sizing, supporting hood design checks and airflow justification.\u003c\/p\u003e\n\u003chr data-start=\"2047\" data-end=\"2050\"\u003e\n\u003ch2 data-start=\"2052\" data-end=\"2104\"\u003eDesigned for Reliability — Not Accidental Changes\u003c\/h2\u003e\n\u003cp data-start=\"2106\" data-end=\"2168\"\u003eTo prevent accidental deletion or overwriting of calculations:\u003c\/p\u003e\n\u003cul data-start=\"2170\" data-end=\"2312\"\u003e\n\u003cli data-start=\"2170\" data-end=\"2204\"\u003e\n\u003cp data-start=\"2172\" data-end=\"2204\"\u003eAll formula cells are \u003cstrong data-start=\"2194\" data-end=\"2204\"\u003elocked\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2205\" data-end=\"2243\"\u003e\n\u003cp data-start=\"2207\" data-end=\"2243\"\u003eInput cells are clearly identifiable\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2244\" data-end=\"2312\"\u003e\n\u003cp data-start=\"2246\" data-end=\"2312\"\u003eThe structure is fixed to maintain consistency and repeatability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2314\" data-end=\"2445\"\u003eThis ensures the calculator behaves the same way every time it’s used — supporting defensible calculations and clear documentation.\u003c\/p\u003e\n\u003chr data-start=\"2447\" data-end=\"2450\"\u003e\n\u003ch2 data-start=\"2452\" data-end=\"2482\"\u003eImportant Professional Note\u003c\/h2\u003e\n\u003cp data-start=\"2484\" data-end=\"2571\"\u003eThis calculator is intended as a \u003cstrong data-start=\"2517\" data-end=\"2536\"\u003ecalculation aid\u003c\/strong\u003e, not a replacement for competence.\u003c\/p\u003e\n\u003cp data-start=\"2573\" data-end=\"2729\"\u003eWhile every effort has been made to enter formulas correctly, \u003cstrong data-start=\"2635\" data-end=\"2705\"\u003eno guarantee can be given that the spreadsheet is free from errors\u003c\/strong\u003e. Users are expected to:\u003c\/p\u003e\n\u003cul data-start=\"2731\" data-end=\"2885\"\u003e\n\u003cli data-start=\"2731\" data-end=\"2766\"\u003e\n\u003cp data-start=\"2733\" data-end=\"2766\"\u003eUnderstand the underlying maths\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2767\" data-end=\"2790\"\u003e\n\u003cp data-start=\"2769\" data-end=\"2790\"\u003eSense-check results\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2791\" data-end=\"2839\"\u003e\n\u003cp data-start=\"2793\" data-end=\"2839\"\u003eVerify calculations manually where necessary\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2840\" data-end=\"2885\"\u003e\n\u003cp data-start=\"2842\" data-end=\"2885\"\u003eApply professional judgement at all times\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2887\" data-end=\"2976\"\u003eIf any errors are identified, feedback is actively encouraged so corrections can be made.\u003c\/p\u003e\n\u003chr data-start=\"2978\" data-end=\"2981\"\u003e\n\u003ch2 data-start=\"2983\" data-end=\"3007\"\u003eWhy This Tool Matters\u003c\/h2\u003e\n\u003cp data-start=\"3009\" data-end=\"3060\"\u003eIn LEV work, small mathematical errors can lead to:\u003c\/p\u003e\n\u003cul data-start=\"3062\" data-end=\"3227\"\u003e\n\u003cli data-start=\"3062\" data-end=\"3087\"\u003e\n\u003cp data-start=\"3064\" data-end=\"3087\"\u003eIncorrect duct sizing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3088\" data-end=\"3123\"\u003e\n\u003cp data-start=\"3090\" data-end=\"3123\"\u003eInadequate transport velocities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3124\" data-end=\"3155\"\u003e\n\u003cp data-start=\"3126\" data-end=\"3155\"\u003eMisinterpreted test results\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3156\" data-end=\"3184\"\u003e\n\u003cp data-start=\"3158\" data-end=\"3184\"\u003ePoor capture at the hood\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3185\" data-end=\"3227\"\u003e\n\u003cp data-start=\"3187\" data-end=\"3227\"\u003eWeak or indefensible Reg 9 conclusions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3229\" data-end=\"3390\"\u003eThis calculator helps reduce avoidable mistakes, improves consistency, and supports clearer thinking — while keeping responsibility firmly with the practitioner.\u003c\/p\u003e\n\u003chr data-start=\"3392\" data-end=\"3395\"\u003e\n\u003ch2 data-start=\"3397\" data-end=\"3426\"\u003eWho This Calculator Is For\u003c\/h2\u003e\n\u003cp data-start=\"3428\" data-end=\"3466\"\u003eThis Excel calculator is suitable for:\u003c\/p\u003e\n\u003cul data-start=\"3468\" data-end=\"3653\"\u003e\n\u003cli data-start=\"3468\" data-end=\"3497\"\u003e\n\u003cp data-start=\"3470\" data-end=\"3497\"\u003eLEV engineers and testers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3498\" data-end=\"3527\"\u003e\n\u003cp data-start=\"3500\" data-end=\"3527\"\u003eTrainee LEV practitioners\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3528\" data-end=\"3555\"\u003e\n\u003cp data-start=\"3530\" data-end=\"3555\"\u003eOccupational hygienists\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3556\" data-end=\"3584\"\u003e\n\u003cp data-start=\"3558\" data-end=\"3584\"\u003eDesigners and installers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3585\" data-end=\"3653\"\u003e\n\u003cp data-start=\"3587\" data-end=\"3653\"\u003eAnyone carrying out LEV calculations as part of COSHH compliance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3655\" data-end=\"3773\"\u003eIt works particularly well alongside \u003cstrong data-start=\"3692\" data-end=\"3719\"\u003eLEV107: Basic LEV Maths\u003c\/strong\u003e, reinforcing the calculations explained in the guide.\u003c\/p\u003e\n\u003chr data-start=\"3775\" data-end=\"3778\"\u003e\n\u003ch2 data-start=\"3780\" data-end=\"3798\"\u003eProduct Details\u003c\/h2\u003e\n\u003cul data-start=\"3800\" data-end=\"4151\"\u003e\n\u003cli data-start=\"3800\" data-end=\"3849\"\u003e\n\u003cp data-start=\"3802\" data-end=\"3849\"\u003e\u003cstrong data-start=\"3802\" data-end=\"3814\"\u003eProduct:\u003c\/strong\u003e Basic LEV Maths Excel Calculator\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3850\" data-end=\"3893\"\u003e\n\u003cp data-start=\"3852\" data-end=\"3893\"\u003e\u003cstrong data-start=\"3852\" data-end=\"3863\"\u003eFormat:\u003c\/strong\u003e Microsoft Excel spreadsheet\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3894\" data-end=\"3983\"\u003e\n\u003cp data-start=\"3896\" data-end=\"3983\"\u003e\u003cstrong data-start=\"3896\" data-end=\"3905\"\u003eTabs:\u003c\/strong\u003e 4 (Basic Maths, Flowrate, Duct Size from Q, Duct Size from Area \u0026amp; Velocity)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3984\" data-end=\"4038\"\u003e\n\u003cp data-start=\"3986\" data-end=\"4038\"\u003e\u003cstrong data-start=\"3986\" data-end=\"3999\"\u003eFormulas:\u003c\/strong\u003e Locked to prevent accidental editing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4039\" data-end=\"4116\"\u003e\n\u003cp data-start=\"4041\" data-end=\"4116\"\u003e\u003cstrong data-start=\"4041\" data-end=\"4054\"\u003eUse Case:\u003c\/strong\u003e LEV design checks, TExT support, training, and verification\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4117\" data-end=\"4151\"\u003e\n\u003cp data-start=\"4119\" data-end=\"4151\"\u003e\u003cstrong data-start=\"4119\" data-end=\"4130\"\u003eAuthor:\u003c\/strong\u003e Louise Davies Wood\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LEV Academy","offers":[{"title":"Default Title","offer_id":52700429222227,"sku":null,"price":25.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/3313\/8771\/files\/Screenshot2026-01-01212307.png?v=1767302674","url":"https:\/\/www.levacademy.co.uk\/products\/useful-excel-calculator-basic-lev-maths","provider":"LEV Academy","version":"1.0","type":"link"}