Percentage Increase Calculator: Track Growth & Measure Progress
The Percentage Increase Formula
Percentage Increase = ((New Value - Old Value) ÷ Old Value) × 100
Simple example:
- Old: $100
- New: $150
- Increase: ($150 - $100) ÷ $100 × 100 = 50% increase
Real-World Examples
Example 1: Salary Raise
- Old salary: $50,000
- New salary: $60,000
- Calculation: ($60,000 - $50,000) ÷ $50,000 × 100 = 20% raise
Example 2: Investment Growth
- Started with: $1,000
- Now worth: $1,300
- Growth: ($1,300 - $1,000) ÷ $1,000 × 100 = 30% return
Example 3: Business Revenue
- Last year: $80,000
- This year: $100,000
- Growth: ($100,000 - $80,000) ÷ $80,000 × 100 = 25% growth
Example 4: Website Traffic
- Previous month: 5,000 visitors
- Current month: 7,500 visitors
- Growth: (7,500 - 5,000) ÷ 5,000 × 100 = 50% increase
Why Percentage Matters More Than Dollar Amount
$100 gain looks impressive. But is it?
- Gain $100 on $1,000 investment = 10% increase ✓ Good
- Gain $100 on $5,000 investment = 2% increase ✗ Weak
- Gain $100 on $500 investment = 20% increase ✓ Excellent
Same $100 gain, vastly different performance.
Percentage increase reveals the truth.
Monthly Tracking Examples
Investment Portfolio
| Month | Value | Monthly Change | % Increase |
|---|---|---|---|
| January | $10,000 | - | - |
| February | $10,800 | $800 | 8% |
| March | $11,664 | $864 | 8% |
| April | $12,597 | $933 | 8% |
Consistent 8% monthly growth compounds to 125% yearly (if maintained).
Business Metrics
| Quarter | Revenue | Change | % Increase |
|---|---|---|---|
| Q1 | $50,000 | - | - |
| Q2 | $62,500 | $12,500 | 25% |
| Q3 | $75,000 | $12,500 | 20% |
| Q4 | $90,000 | $15,000 | 20% |
Notice: Same $12,500 gain looks different as percentages (25% then 20%).
Mental Math Trick
Rule of 70: Estimate doubling time
If something grows 10% per year:
- Time to double ≈ 70 ÷ 10 = 7 years
If something grows 7% per year:
- Time to double ≈ 70 ÷ 7 = 10 years
This helps you evaluate long-term growth realistically.
Growth Benchmarks
| Growth % | What It Means |
|---|---|
| 5% | Slow, conservative growth |
| 10% | Good, healthy growth |
| 20%+ | Strong, aggressive growth |
| 50%+ | Exceptional, rapid growth |
| 100%+ | Doubling (rare, suspicious if promised) |
Common Growth Mistakes
Mistake 1: Confusing Percentage vs. Percentage Points
- ❌ "From 10% to 15% is a 5% increase"
- ✅ "From 10% to 15% is a 50% increase" (and 5 percentage points)
Mistake 2: Not Accounting for Compound Growth
- ❌ Assuming 10% × 12 months = 120% yearly
- ✅ Each month builds on previous growth = 213.8% yearly
Mistake 3: Ignoring the Base Amount
- ❌ $100 gain is always good
- ✅ $100 gain on $500 is excellent (20%), on $10,000 is poor (1%)
Tools for Tracking Growth
- Percentage Increase Calculator - Calculate growth instantly
- What Percent is A of B - Compare values
- Percentage of a Number - Project future values
The Bottom Line
Percentage increase shows you how much something actually grew relative to where it started. Use our percentage increase calculator to track progress in salary, investments, business, fitness, or any metric.
Monitor percentage growth—it tells the real story.
Blog 5: Bulk Discount Calculator: Wholesale Savings Explained
title: 'Bulk Discount Calculator: Save Money on Wholesale Orders' description: >- Learn how bulk discounts work and whether buying in bulk actually saves money. Complete guide with formulas, real examples, and per-unit calculations. slug: 'bulk-discount-calculator-guide' url: '/blog/bulk-discount-calculator-guide/' date: '2025-01-21' readTime: '7 min read' tags:
- bulk discount
- wholesale discount
- volume discount
- bulk buying
- per-unit cost
- business savings
- discount calculator
"Buy in bulk and save!" Sounds great. But does it always save money? Bulk discounts can be deceptive. A 20% off bulk order still requires you to pay for items you might not use. This guide shows you how to calculate bulk discounts correctly and determine if buying in bulk truly saves you money.
Understanding Bulk Discount Tiers
Most stores offer tiered bulk discounts:
| Quantity | Discount |
|---|---|
| 1-5 units | No discount |
| 6-10 units | 10% off |
| 11-20 units | 15% off |
| 21-50 units | 20% off |
| 50+ units | 25% off |
The more you buy, the higher the discount.
The Bulk Discount Formula
Total Cost = (Unit Price × Quantity) × (1 - Discount%) Per-Unit Cost = Total Cost ÷ Quantity
Real Bulk Discount Examples
Example 1: Office Supplies
Pens normally: $1.00 each
| Quantity | Discount | Total Cost | Per-Unit Cost | vs. Regular |
|---|---|---|---|---|
| 5 | 0% | $5.00 | $1.00 | - |
| 10 | 10% | $9.00 | $0.90 | Save $1.00 |
| 25 | 15% | $21.25 | $0.85 | Save $3.75 |
| 50 | 20% | $40.00 | $0.80 | Save $10.00 |
Buying 50 pens saves you $10 (20% total savings).
Example 2: Coffee Beans
Coffee normally: $15.00 per pound
| Quantity | Discount | Total | Per-Pound Cost | Savings |
|---|---|---|---|---|
| 1 lb | 0% | $15.00 | $15.00 | - |
| 5 lbs | 5% | $71.25 | $14.25 | $3.75 |
| 10 lbs | 10% | $135.00 | $13.50 | $15.00 |
| 25 lbs | 15% | $318.75 | $12.75 | $56.25 |
Buying 25 lbs saves $56.25 compared to single-pound purchases.
Example 3: The Deceptive Bulk Deal
T-shirts normally: $20.00 each
Bulk offer: "Buy 50 t-shirts at 25% off!"
❌ Wrong thinking: "I save $250!"
- 50 × $20 = $1,000
- 25% off = $250 savings
✅ Reality check:
- Total cost: 50 × $20 × 0.75 = $750
- Per-shirt cost: $750 ÷ 50 = $15 each
- But: Do you need 50 t-shirts?
- If you'd normally buy 10: You're paying $150 more than needed
- Bulk "savings" = -$150 (you lose money!)
When Bulk Discounts Actually Save Money
Scenario 1: Essential Items You Use Regularly
- Office supplies (pens, paper, folders)
- Food staples (rice, beans, flour)
- Household basics (soap, toothpaste, cleaning supplies)
Action: Buy in bulk ✓
Scenario 2: Items with Long Shelf Life
- Canned goods
- Dry pasta
- Spices
- Non-perishables
Action: Buy in bulk ✓
Scenario 3: Items You Share with Others
- Coffee for office
- Snacks for team
- Paper products for business
Action: Buy in bulk ✓
When Bulk Discounts DON'T Save Money
Scenario 1: Items That Spoil
- Fresh produce (expires quickly)
- Dairy products
- Meat
Action: Don't bulk buy ✗
Scenario 2: Items You Rarely Use
- Specialty ingredients
- Seasonal items
- Trendy products
Action: Don't bulk buy ✗
Scenario 3: Items Taking Storage Space
- Bulky items
- Limited storage
- Items you can't use before expiration
Action: Don't bulk buy ✗
The True Cost: Storage & Waste
Bulk buying has hidden costs:
- Storage space: Where do 50 items go?
- Spoilage: Some items expire before use
- Capital: Money tied up in inventory
- Opportunity cost: Money not invested elsewhere
Real formula:
True Savings = Discount Savings - (Storage + Spoilage + Interest)
Tools for Bulk Calculations
- Percentage of a Number - Calculate discount amounts
- Discount Calculator - Find final bulk price
- What Percent is A of B - Compare unit prices
The Bottom Line
Bulk discounts save money ONLY on items you actually need and use before expiration. Calculate your per-unit cost, compare to regular purchases, account for storage and spoilage, then decide.
Smart buying beats bulk buying.
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