Result & Grade Calculator

Add subjects, apply weights, preview target scores & see visual breakdowns.

Target Percentage (optional): Grade Scale:

Summary

Total Obtained: 0

Total Marks: 0

Weighted Percentage: 0.00%

Letter Grade: N/A

Notes

Each subject can have a weight (%) — total weights ideally should be 100%.
If weights are left 0, weights will be auto-normalized from total marks.
Use “Target Percentage” to see what you still need on remaining marks.

`; printWindow.document.write(html); printWindow.document.close(); printWindow.focus(); setTimeout(()=>printWindow.print(), 500); }// Apply custom scale function applyCustomScale(text){ try { const parts = text.split(',').map(p=>p.trim()).filter(Boolean); const scale = parts.map(p=>{ const [label,min] = p.split(':').map(x=>x.trim()); return {label:label, min: parseFloat(min)}; }).filter(Boolean).sort((a,b)=>b.min - a.min); if(scale.length) gradeScale = scale; recalc(); return true; } catch(e){ return false; } }// Events addBtn.addEventListener('click', ()=>addSubject()); clearBtn.addEventListener('click', ()=>{ subjects = []; subjectsList.innerHTML = ''; addSubject(); recalc(); }); exportCSV.addEventListener('click', exportToCSV); printResult.addEventListener('click', printCalc);gradeScaleSelect.addEventListener('change', ()=>{ const v = gradeScaleSelect.value; if(v === 'custom') customScaleWrap.style.display = 'block'; else { customScaleWrap.style.display = 'none'; if(v === 'default'){ gradeScale = [ {label:'A+', min:90},{label:'A', min:80},{label:'B', min:70},{label:'C', min:60},{label:'D', min:50},{label:'F', min:0} ]; } else if(v === 'gpa'){ gradeScale = [ {label:'4.0', min:90},{label:'3.7', min:85},{label:'3.3', min:80},{label:'3.0', min:75},{label:'2.0', min:70},{label:'0', min:0} ]; } recalc(); } });applyScaleBtn.addEventListener('click', ()=>{ const val = customScaleInput.value; if(applyCustomScale(val)){ alert('Custom scale applied.'); customScaleWrap.style.display = 'none'; gradeScaleSelect.value = 'custom'; } else alert('Invalid scale format.'); });targetInput.addEventListener('input', recalc);// init addSubject(); addSubject(); recalc(); })();