How is total MSY calculated?

Multiply the number of slots in each AmeriCorps position type by that position type's MSY value, then sum the results. Full-time = 1.0, Three quarter-time = 0.7, Half-time = 0.5, Reduced half-time ≈ 0.3809524, Quarter-time ≈ 0.26455027, Minimum-time ≈ 0.21164022, Abbreviated-time ≈ 0.05627705.

Who built this calculator?

America Learns — a partner to 300+ AmeriCorps programs and 18 state service commissions — built this free calculator to help the AmeriCorps community during application and budgeting season.

How many MSYs is a half-time AmeriCorps member?

A half-time AmeriCorps position is 0.5 MSY. Half-time members serve 900 hours.

How many MSYs is a Reduced half-time AmeriCorps member?

A Reduced half-time AmeriCorps position is approximately 0.3809524 MSY. Reduced half-time members serve 675 hours.

What is the difference between a slot and an MSY?

A slot is one funded AmeriCorps service opportunity. An MSY (Member Service Year) is the unit of service measurement equal to 1,700 hours. Ten full-time slots equal 10 MSYs; ten half-time slots equal only 5 MSYs.

What is cost-per-MSY?

Cost-per-MSY is the total federal AmeriCorps grant request divided by total MSYs. AmeriCorps publishes a maximum cost-per-MSY each competition year; programs requesting more must justify the higher amount.

Can I claim a member who served only part of the year?

Yes, if the member completed enough service hours to meet a recognized position type's hour requirement. They are claimed at the MSY value of the position type whose hour threshold they met.

Does the MSY calculator store my data?

No. All calculations run entirely in the browser. Slot counts are never uploaded, logged, or stored.

Can I embed the AmeriCorps MSY calculator on my own website?

Yes — free of charge. America Learns provides a one-line script tag, an auto-mount data attribute, and an iframe embed. See the Embed page for copy-paste snippets and the programmatic API.

Is this an official AmeriCorps tool?

No. It is a free community tool built by America Learns, an independent software partner to AmeriCorps programs and state service commissions. AmeriCorps is a registered service mark of the federal agency.

Is there a JSON API for the MSY calculation?

Yes. GET https://americorpsmsy.americalearns.com/api/msy with slot counts as query parameters (e.g. ?full_time=10&half_time=4&quarter_time=2). The response returns totalMsy, per-position breakdown, and the canonical position-type table. CORS-enabled.

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300+: AmeriCorps programs served
18: State service commissions
20+ yrs: Supporting national service

About America Learns

Built by the team that powers national service.

America Learns proudly serves 300+ AmeriCorps programs and 18 state service commissions. We created this MSY calculator to help the community easily calculate these numbers during application and budgeting season — no spreadsheet wrestling required.

Need more than a calculator? Our platform supports the full AmeriCorps lifecycle — volunteers' time tracking, performance measures, grant management, and impact reporting.

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Two decades supporting State & National, VISTA, NCCC, and Senior Corps grantees.

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Trusted by 18 state service commissions to manage their subgrantee networks.

Built for compliance

MSY math, position-type rules, and grant calculations modeled to AmeriCorps standards.

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This calculator is free, embeddable, and open to every AmeriCorps program.

MSY 101

What is an AmeriCorps MSY?

MSY — Member Service Year — is the AmeriCorps unit of measurement equal to one full-time volunteer serving 1,700 hours. Part-time position types contribute fractional MSYs. To get a program's total MSYs, multiply the number of slots in each position type by its MSY value and sum the results.

Position type	Service hours	MSY value
Full-time	1700	1.0
Three quarter-time	1200	0.7
Half-time	900	0.5
Reduced half-time	675	0.3809524
Quarter-time	450	0.26455027
Minimum-time	300	0.21164022
Abbreviated-time	100	0.05627705

Position-type reference (plain language)

Full-time AmeriCorps members serve 1,700 hours and count as 1.0 MSY each. This is the standard yardstick the rest of the table is built on.

Three quarter-time members serve 1,200 hours and count as 0.7 MSY. Common in programs that pair service with school or a part-time job.

Half-time members serve 900 hours and count as 0.5 MSY. Often used by college-based and summer-extended programs.

Reduced half-time members serve 675 hours and count as approximately 0.3809524 MSY. Useful for school-year programs that don't quite hit 900 hours.

Quarter-time members serve 450 hours and count as approximately 0.26455027 MSY.

Minimum-time members serve 300 hours and count as approximately 0.21164022 MSY. The lowest term typically used by year-round programs.

Abbreviated-time members serve 100 hours and count as approximately 0.05627705 MSY. Often used for short summer terms.

Worked example: 10 full-time + 4 half-time + 2 quarter-time slots = (10 × 1.0) + (4 × 0.5) + (2 × 0.26455027) = 10.0 + 2.0 + 0.529 ≈ 12.53 Total MSYs.

Need a deeper glossary? See the AmeriCorps glossary for plain-language definitions of slot, position type, living allowance, Segal Education Award, cost-per-MSY, state service commission, subgrantee, VISTA, and more.

FAQ

Frequently asked questions about AmeriCorps MSYs

How many MSYs is a half-time AmeriCorps member?: 0.5 MSY. Half-time members serve 900 hours.
How many MSYs is a Reduced half-time AmeriCorps member?: Approximately 0.3809524 MSY. Reduced half-time members serve 675 hours.
What's the difference between a slot and an MSY?: A slot is one funded AmeriCorps service opportunity. An MSY is the unit of service measurement (1,700 hours = 1.0 MSY). Ten full-time slots = 10 MSYs; ten half-time slots = 5 MSYs.
What is cost-per-MSY?: Total federal AmeriCorps grant request divided by total MSYs. AmeriCorps publishes a maximum cost-per-MSY each competition year.
Can I claim a member who served only part of the year?: Yes, if they completed enough hours to meet a recognized position type's minimum. They are claimed at the MSY value of the position type whose hour threshold they met.
Does the calculator store my data?: No. All calculations run in your browser. Slot counts are never uploaded, logged, or stored.
Can I embed this calculator on my own website?: Yes, free of charge. America Learns provides a one-line script tag, an auto-mount data attribute, and an iframe embed. See the Embed page for snippets.
Is this an official AmeriCorps tool?: No. It's a free community tool built by America Learns, an independent software partner to AmeriCorps programs and state service commissions.
Is there a JSON API?: Yes. GET /api/msy?full_time=10&half_time=4&quarter_time=2 returns totalMsy, per-position breakdown, and the canonical position-type table. CORS-enabled.