The 2007 F1 world champion set the seventh fastest time overall across four days of running in Bahrain last week, just behind double world champion team-mate Fernando Alonso, who drove the car on the first two days.
While Raikkonen played down the disruption caused by a crash at the end of the final day, telemetry issues earlier in the week prevented the Scuderia from undertaking a race-run at the Sakhir circuit.
Ten things we learned from Bahrain F1 test
Raikkonen reckons the team has proven the reliability of its package, but he is yet to get an idea of how Ferrari stacks up against its opposition.
"We're not really so impressive in our lap time but we will see exactly where we are in Australia in the first race," he said.
"From the reliability aspect we are OK, but speed-wise I don't know where we are.
"I think we are not too bad really. There are lots of things to do still, and obviously I know our own situation but I've no idea what the others are doing.
"We'll keep doing our work and hopefully find out we are more or less where we should be."
Raikkonen said Ferrari still needed to work on its engine and improve the set-up of the F14 T.
"It's not too bad. Power-wise we will have to see next week what we can do, but it's not any major issue," he added.
"There are little things we still want to improve and we will just try to understand a little bit the changes and what the car will do.
"It's pretty OK right now, but we want to improve and there is still a long way to go before the season.
"Obviously everything is different [this year] so we are trying to learn. Next week we can put it all together and see where we are."