Aging　coefficient　and　creep　coefficient　are　important　parameters　for　creep　analysis　of　any　structure.　With　the　aim　to　obtain　those　parameters,　an　experimental　investigation　is　carried　out　on　sealed　concrete.　Altogether　ten　specimens　were　tested,　out　of　which　four　were　for　creep,　two　for　shrinkage　and　remaining　four　for　relaxation　test.　A　year　of　relaxation　test　and　two　years　of　creep　test　results　were　analyzed　to　compute　aging　coefficient　and　creep　coefficient.　From　regression　analysis　of　observed　and　calculated　aging　coefficient　using　formula　of　Bazant　and　Kim,　modification　for　aging　coefficient　is　performed　and　extrapolation　equations　are　generated.　Instead　of　ACI　model,　B3　model　has　been　used　to　obtain　compliance　function　as　the　parameters　of　B3　model　seems　more　relevant　to　creep　mechanism　of　concrete　compared　to　that　of　ACI　model.