Inflation Record$100 in 1975 → Today (Australia)
Official data verified · CPI (ABS) · Annual average · Not seasonally adjusted · Data through September 2026 (fetched 2026-11-02) · All groups CPI, weighted average of eight capital cities (6401.0)
$925.84
+825.8% cumulative inflation · 1975–2026
Your $100 in 1975 would have the purchasing power of $925.84 in Australia today.
What this means
- Purchasing power: $100 in 1975 had the same average buying power as $925.84 in 2026.
- Price level change: the overall consumer price level rose by 825.8% across this 51-year span; the purchasing power of a dollar changed by -89.2%.
- This measures the broad basket of consumer goods and services (CPI (ABS)). Individual expenses moved at different rates.
What this means in other amounts
| In 1975 | Worth in 2026 |
|---|---|
| $1 | $9.26 |
| $5 | $46.29 |
| $10 | $92.58 |
| $20 | $185.17 |
| $50 | $462.92 |
| $100 | $925.84 |
| $500 | $4,629.19 |
| $1,000 | $9,258.39 |
| $10,000 | $92,583.86 |
| $100,000 | $925,838.61 |
Key facts about 1975
- Consumer prices rose 15.2% in 1975 — the 4th-largest annual increase in the 1949–2026 record.
- 1975 is in the quarterly-CPI era: its annual average is the mean of the year's four quarterly indexes.
- In the decade after 1975, prices rose 145.9% in total.
$100 in 1975, decade by decade
| Year | Worth | Cumulative price change |
|---|---|---|
| 1985 | $245.92 | +145.9% |
| 1995 | $407.52 | +307.5% |
| 2005 | $520.22 | +420.2% |
| 2015 | $675.08 | +575.1% |
| 2025 | $894.16 | +794.2% |
| 2026 | $925.84 | +825.8% |
Quarterly CPI in 1975
| Period | Index | Change vs same period, prior year |
|---|---|---|
| Q1 | 15.3 | 17.7% |
| Q2 | 15.8 | 17.0% |
| Q3 | 15.9 | 12.0% |
| Q4 | 16.8 | 14.3% |
Annual average for 1975: 15.950
Verify this calculation
Series: All groups CPI, weighted average of eight capital cities (6401.0); base 2011-12=100; not seasonally adjusted.
Index (1975 annual average): 15.950 · Index (2026 annual average): 147.671 · Ratio: 9.2584
Formula: amount × (indexend / indexstart). Formula v1.0 — annual-average CPI, NSA (per-country basis on each methodology page). Source: Australian Bureau of Statistics.