UK Tax Codes Explained (2026/27): 1257L, BR, K and Emergency Codes
Decode any UK tax code — 1257L, BR, K and emergency codes — for 2026/27.

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Education & Academia
Every Education calculator on Calculadora.co.uk — free, fast and built for the UK.
Grade calculators for GPA, weighted averages, final grades and the mark you need on the next test — ready for GCSE, A-Level, ENEM, SISU and uni.
8 calculators in this category · updated weekly
Work out the average, median and standard deviation of class scores from a paste-in list, with letter-grade distribution.
Estimate your ENEM score using the TRI (Item Response Theory) approximation and compare against SISU cut-offs by course.
Work out your final grade in a module from weighted assignment, coursework and exam marks — with a "what-if" slider for each.
Work out your Grade Point Average on a 4.0 (US), 4.33 (Canada) or UK honours classification, from letter grades and credits.
Work out the mark you need on a remaining test or assignment to hit a target overall grade, from current grades and weights.
Convert a raw score into a percentile against a class, test batch or distribution — handy for SATs, ENEM and IQ tests.
Work out the SISU cut-off for a course using ENEM weights per area (Linguagens, Matemática, etc.) and redação.
Work out a weighted grade from any number of assessments with different weights — coursework 30%, midterm 30%, final 40%, etc.
Work out the average, median and standard deviation of class scores from a paste-in list, with letter-grade distribution.
Estimate your ENEM score using the TRI (Item Response Theory) approximation and compare against SISU cut-offs by course.
Work out your final grade in a module from weighted assignment, coursework and exam marks — with a "what-if" slider for each.
Work out your Grade Point Average on a 4.0 (US), 4.33 (Canada) or UK honours classification, from letter grades and credits.
Work out the mark you need on a remaining test or assignment to hit a target overall grade, from current grades and weights.
Work out the SISU cut-off for a course using ENEM weights per area (Linguagens, Matemática, etc.) and redação.
Work out a weighted grade from any number of assessments with different weights — coursework 30%, midterm 30%, final 40%, etc.
A quick glossary covering the controlled vocabulary we keep consistent across every calculator in this cluster.
Decode any UK tax code — 1257L, BR, K and emergency codes — for 2026/27.
Salary sacrifice, worked line by line — pensions, EVs and the tax/NI savings.
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