π± Money Supply Calculator
Build M1 and M2 from their components.
M2 money supply
Estimates for planning only, not financial advice.
The money supply is measured in layers: M1 counts cash and spendable deposits, M2 adds savings and near-money on top. Build it from components: $2,300 billion in currency plus $5,400 billion in demand deposits plus $1,100 billion in other checkable deposits gives M1 of $8,800 billion; adding $12,500 billion in savings, $600 billion in small time deposits, and $1,900 billion in money funds gives M2 of $23,800 billion. This calculator assembles both aggregates from your component inputs.
The defaults are illustrative teaching values, not current data: actual US M2 runs near $22 trillion and moves weekly. Use the calculator to learn the structure, then check the Fed's H.6 release or FRED for the live numbers.
How to Use This Calculator
Enter each component in billions of dollars. The calculator sums M1 and M2 and shows the composition shares.
Enter currency, demand deposits, and other checkable deposits: the M1 pieces.
Enter savings deposits, small time deposits, and retail money market funds: the M2 additions.
Read M1 and M2 with their composition. For how reserves multiply into these totals, our money multiplier calculator shows the theory.
The Formulas
Each layer answers a different question. M1 asks what can be spent today. M2 asks what can be spent soon. The monetary base underneath asks what the central bank directly created. Confusing the layers is how commentators turn a definitional reclassification, like the 2020 savings shift that exploded M1, into a false inflation alarm.
What Each Component Means
| Component | In | What it is |
|---|---|---|
| Currency | M1 | Notes and coins outside banks |
| Demand deposits | M1 | Checking accounts |
| Other checkable | M1 | NOW and similar accounts |
| Savings deposits | M2 | Savings accounts, MMDAs |
| Small time deposits | M2 | CDs under $100,000 |
| Retail money funds | M2 | Money market mutual funds |
Savings deposits dominate M2, which is why household saving behavior moves the broad aggregate more than anything banks do. For the price-level consequences of money growth, our inflation calculator translates money into purchasing power.
Worked Example
With the defaults, all in $ billions: M1 = 2,300 + 5,400 + 1,100 = $8,800 billion, or $8.8 trillion. M2 = 8,800 + 12,500 + 600 + 1,900 = $23,800 billion, or $23.8 trillion. Currency is 2,300 / 8,800 = 26.1 percent of M1. Savings are 12,500 / 23,800 = 52.5 percent of M2, the single biggest piece. M1 is 37.0 percent of M2, showing how much of broad money sits in immediately spendable form.
Reading the Aggregates
Watch growth rates, not levels: accelerating M2 growth with stable velocity has historically preceded inflation, while M1 composition shifts often mean nothing. Distrust any commentary that cites one aggregate's level as proof of anything; the structure above shows how many moving parts one number hides.
My rule: learn the components once, then follow M2 growth year over year on FRED. It is the broadest honest measure of money in the economy, and this calculator is the map of what sits inside it.
Reading Money Supply Like the Fed
The Fed watches money supply growth as an inflation signal, but the relationship is loose. Rapid M2 growth with stagnant velocity, dollars changing hands slowly, produces little inflation; this described much of the 2010s. The inflation of 2021 to 2023 followed the rare combination of fast M2 growth and fiscal transfers that raised velocity, as stimulus checks got spent quickly.
Velocity is the missing variable this calculator does not show: GDP divided by M2 tells you how hard each dollar works. When velocity falls, the same money supply supports less economic activity, which is why central banks cannot just print growth. Analysts also watch the composition: a rising currency share of M1 can signal economic stress or informal activity, while surging savings deposits suggest precautionary behavior. For the price-level consequences, our inflation calculator translates money growth into purchasing power.
M1, M2, and Monetary Policy Transmission
When the Fed raises rates, it does not directly shrink M1 or M2; it makes holding deposits more attractive relative to spending, which slows money growth and velocity together. Quantitative tightening works more mechanically, letting bonds roll off the balance sheet, which drains reserves and, over time, deposits. Both operate with the famous long and variable lags, often 12 to 18 months before the full effect lands.
This is why money supply data is a rearview mirror with predictive value: sustained M2 contraction has preceded most modern recessions, though the signal is noisy enough that the Fed targets inflation and employment directly rather than money growth. Watch the growth rate, not the level: M2 growing 6 percent annually alongside 2 percent real growth leaves room for roughly 4 percent nominal expansion, the arithmetic behind every inflation forecast. For the interest-rate side of policy, our APR calculator translates policy rates into borrowing costs.
Estimates for planning only, not financial advice.Frequently Asked Questions
What is the money supply?
The total stock of money in an economy, measured in nested aggregates. M1 is the narrowest: cash and spendable deposits. M2 adds savings deposits, small time deposits, and retail money market funds. Central banks track them because money growth relates to inflation, spending, and financial conditions.
How do you calculate M1?
Add currency in circulation, demand deposits, and other checkable deposits. With $2,300 billion in currency, $5,400 billion in demand deposits, and $1,100 billion in other checkable deposits, M1 is $8,800 billion. Traveler's checks, once included, are now negligible.
How do you calculate M2?
Start with M1 and add savings deposits, small-denomination time deposits under $100,000, and retail money market fund balances. With the default components, M2 is $8,800 + $12,500 + $600 + $1,900 = $23,800 billion. M2 is the most widely cited aggregate.
What is the difference between M1 and M2?
Liquidity. M1 is money you can spend immediately: cash and checking. M2 adds near-money that converts to spendable funds quickly: savings and money funds. When households shift savings into checking, M1 rises and M2 stays flat; the composition changed, not the total.
Why did M1 explode in 2020?
The Fed reclassified savings deposits as transaction accounts in May 2020, moving roughly $10 trillion from the savings bucket into M1 overnight. M1 jumped while M2 barely moved, a pure definitional change. It is the textbook case for checking definitions before reading economic meaning into a spike.
What is the monetary base?
Currency in circulation plus bank reserves held at the central bank, the narrowest measure, sometimes called M0 or high-powered money. The Fed expanded the base enormously after 2008 through quantitative easing, but broad money grew far less because banks held the new reserves as excess rather than lending them.
Does money supply growth cause inflation?
Over long horizons they correlate, but the short-run link is loose: velocity, how fast money changes hands, moves too. The quantity theory says money x velocity equals prices x output, so inflation can stay tame during money growth if velocity falls, exactly what happened in the 2010s.
What are M3 and larger aggregates?
M3 added large time deposits, institutional money funds, and other big liquid assets, but the Fed stopped publishing it in 2006 as uninformative for policy. Researchers still build broad-money measures; for most purposes M2 is the standard broad aggregate in the US.
Where do I find actual M1 and M2 data?
The Federal Reserve's H.6 statistical release, published weekly, and the FRED database, which charts both series back decades. Actual recent M2 runs near $22 trillion, so treat this calculator's illustrative defaults as a teaching model and check FRED for the live figures.
How does the Fed influence the money supply?
Primarily through interest rates now: the federal funds rate and interest on reserves steer bank lending, which creates deposits and expands M1 and M2. Quantitative easing and tightening adjust the monetary base directly. Reserve requirements, once a tool, were set to zero in 2020.