Percentage Calculator
The complete toolkit for all your percentage calculations
Difference %
Example: Between 100 and 120 = 20%
Variation %
Example : 100 ±10% = 110 or 90
Simple variation
Example: 200 → 250 = +25%
Value in %
Example: 100 = 10% of 1000
Coefficient ×
Example: 1000 = 100 × 10
Before addition
Example: 110+10% = 100 Before addition
Before discount
Example: 100 before -10% = 90
Addition %
Example: 100+10% = 110
Deduction %
Example: 100-10% = 110
💡 Calculations with VAT Included or without VAT
🔢 Pre-tax → Tax-inclusive
100€ Ex. VAT + 10% of taxes = 110€ Inc. VAT
+10% of taxes of 100€ Ex. VAT = 10€ of taxes
🔢 Tax-inclusive → Pre-tax
110€ Inc. VAT with 10% of taxes = 100€ Ex. VAT
110€ Inc. VAT - 100€ Ex. VAT = 10€ of taxes
🏷️ Practical discount calculation examples
🔻 Apply a discount
150€ - 20% of discount = 120€
discount of 20% on 150€ = 30€ of savings
You save 30€ thanks to this discount
🔍 Find the original price
120€ after 20% of discount = 150€ original price
original price 150€ - 30€ discount = 120€
The discount was 30€
🎯 Cascade discounts (example)
Initial price
200€
1st discount (-30%)
140€
(-60€)
2nd discount (-10%)
126€
(-14€)
💡 Total savings : 74€ (37% of initial price)
📝 Remember : Cascade discounts don't add up! A 30% then 10% discount ≠ 40% total discount. Each discount applies to the already reduced price.
⚡ SLA (Service Level Agreement) calculation examples
✅ Calculate uptime
8736h uptime / 8760h total = 99.73% availability
Downtime : 24h (0.27%)
Good SLA level, satisfactory availability
⏱️ Allowed downtime
8760h total period × 0.1% Allowed downtime = 8.76h max downtime
max downtime : 526 minutes / 0.4 days
Downtime budget: 8.76h per year
📊 Standard SLA levels (per year)
99%
87.6h/an
Basic
99.9%
8.76h/an
Good
99.99%
52.6min/an
Excellent
99.999%
5.3min/an
Exceptional
🔧 Technical note : SLA measures service availability. The higher the percentage, the less downtime is allowed. A 99.9% SLA only permits 8h45 of downtime per year!
Professional calculator - All your percentage calculations in one click